Recording apparatus, reproducing apparatus, data processing apparatus, recording/reproducing apparatus, and data transmitting apparatus

ABSTRACT

In the case that data such as AV data is recorded in a recording apparatus and/or in the case that data is reproduced by a reproduction apparatus, there is no concrete mechanism that protects copyright.  
     An encryption means  11  for encrypting AV data sent from an interface  4 , a control means  14  for controlling the encrypted AV data to be recorded and a recording means  15  controlled by the control means  14  for recording the encrypted AV data in a magnetic disk are provided such that the control means  14  controls the recorded data to be reproduced, the recording means  15  is controlled by the control means  14  so as to reproduce the data recorded on the disk and a decryption means  12  decrypts the reproduced data that is sent to the interface.

TECHNICAL FIELD

[0001] The present invention relates to a recording apparatus forrecording data, a reproduction apparatus for reproducing data, a dataprocessing apparatus for moving or copying data that is recorded in arecording medium into another apparatus, a recording and reproductionapparatus for recording and reproducing data that is moved in such amanner, a data transmission apparatus for transmitting a stream formedof a plurality of pieces of data and a recording apparatus as well as arecording and reproduction apparatus for reproducing, with a time shift,the contents that are broadcast via TV broadcasting, or the like, so asto be viewed after being delayed a predetermined period of time.

BACKGROUND TECHNOLOGY

[0002] It is necessary to protect a copyright in the case of dealingwith data, for which copyright protection is necessary, such as a newmovie, a TV program or music of a fee charging broadcast. As aneffective method of protecting a copyright, there is the method oflimiting the utilization of data by encrypting the data of which thecopyright requires protection.

[0003] For example, at the time of the transmission of audio and visualdata (hereinafter denoted as AV data), in the case that copyrightprotection is necessary for the AV data, the AV data is encrypted beforebeing transmitted. As an example of the above, IEEE1394-DTCP (digitaltransmission protection) system has become a standard.

[0004] IEEE1394 allows data to be synchronously transmitted by means ofa fast bus system that carries out a serial transmission and, therefore,it is possible to transmit AV data, or the like, in real time. ThisIEEE1394 system is being installed in a variety of digital audio andvisual equipment, including household digital AV equipment as anexternal interface.

[0005] According to the IEEE1394-DTCP system, a certification functionand the function of the nullification of a key are provided at the timeof data transmission via an IEEE1394 bus so that the copyrightprotection can be-realized by encrypting data for which copyrightprotection is necessary, such as AV data before being transmitted.

[0006] Now, together with the spread and development of personalcomputers, a large number of recording apparatuses or reproductionapparatuses, such as a hard disk apparatus, have come into use, due totheir large storage capacity and due to their high speed of access, asexternal memory apparatuses. Furthermore, hard disk apparatuses haverecently come into use not only in computers but also in digital AVequipment, or the like, where video and sound are recorded andreproduced by applying digital technology so as to make use of theirhigh speed of access and their large storage capacity.

[0007] Accordingly, there have been cases where a creator of a movie,and the like, consider that a third party should not be allowed tofreely make copies of data prepared by themselves. Therefore, thereexists data that is prohibited from being copied in another recordingmedium and there exists data that is allowed to be copied only one timein order to protect the copyright thereof.

[0008] In the case that such data is stored in, for example, an HDD bybeing copied, the data is reproduced by using only the HDD.

[0009] In addition, as one way of viewing a TV broadcast that has beenconventionally widely used, a program (content) that has been broadcastis temporarily recorded in a recording apparatus, such as a VTR, so thatthe recorded data is reproduced at a later time and, thereby, theprogram is viewed at a time different from its original broadcast time.

[0010] In particular, in the case that a recording medium such as a harddisk where a random access is possible and where recording andreproduction are possible at the same time is used for a recordingapparatus, a time shift reproduction, according to a narrow definition,can be implemented in a manner such that the content of a program can beviewed in sequence without any portion being missed even after beingdelayed for only a short period of time during the broadcasting time ofthe program in comparison with a VTR wherein a conventional tape mediumis used.

[0011]FIG. 43 is a configuration diagram of a recording and reproductionapparatus for implementing a time shift reproduction according to theprior art. As shown in the figure, a recording and reproduction means2120 is a means of recording and reproducing broadcasts inputted fromthe outside, a recording medium 2130 is a means of storing data ofbroadcasts that can be implemented by a hard disk, or the like, aswitching means 2160 is a means of receiving inputs from the recordingand reproduction means 2120 and inputs of broadcasts from the outsideand for selecting any of them which is then outputted to an externalmonitor, or the like.

[0012] An example of the operation of a recording and reproductionapparatus according to the prior art that has such a configuration isdescribed in the following.

[0013] First, in the case that a viewer is viewing a program in realtime, the switching means 2160 carries out a setting such that thebroadcast inputted from the outside is outputted to the monitor withoutchange while the recording and reproduction means 2120 records the sameprogram content in the recording medium 2130.

[0014] Next, in the case that the viewer returns again to a position infront of the monitor so as to restart viewing of the program aftertemporarily leaving the position in front of the monitor, the recordingand reproduction means 2120 reproduces the recorded data from the pointin time when the viewer left the position in front of the monitor whilethe switching means 2160 carries out the setting such that input fromthe recording and reproduction means 2120 is outputted to the monitor.After this, the viewer views the reproduction output from the recordingand reproduction means 2120 as the program.

[0015] In the above described operation, the recording and reproductionmeans 2120 reproduces data while carrying out the recording of thebroadcast inputted from the outside in a parallel manner. That is tosay, the recording and reproduction means 2120 simultaneously carriesout the reproduction and the recording of the data.

[0016] Thereby, even in the case that the viewer has to temporarilyinterrupt the viewing of a real time broadcast program, it becomespossible to view and to follow the content of the program without a gap,with a delay in accordance with the period of time, only, ofinterruption of viewing.

[0017] In the same manner as in the case of the transmission of AV data,however, a system for copyright protection is necessary in the case thatAV data that requires copyright protection is recorded in and/orreproduced from a recording medium, such as a hard disk apparatus. Howthe copyright is protected, however, is not concretely determined in thecase that AV data that requires copyright protection is recorded inand/or reproduced from a recording apparatus and/or reproductionapparatus.

[0018] In addition, in some cases copyright protection is required, inthe same manner as for AV data, for document data sent via the Internet,or the like, and for computer programs, such as game software, inaddition to AV data. How the copyright is protected, however, is notconcretely determined in the case that the above described data thatrequires copyright protection is recorded in and/or reproduced from arecording apparatus and/or reproduction apparatus.

[0019] That is to say, there is a problem wherein there is no concretesystem that protects the copyright in the case that AV data, documentdata or data such as computer programs are recorded in a recordingapparatus and/or in the case that these types of data are reproduced ina reproduction apparatus.

[0020] In addition, when the remaining capacity for data recording inthe above described HDD becomes small, it becomes necessary to overwritenew data on the data recorded in the HDD or to increase the remainingcapacity by eliminating a portion of data that is recorded in the HDD.However, the user of the HDD considers that overwriting the data that isrecorded in the HDD or the elimination of the data is not desirable and,in some cases, the user considers it desirable to copy the data recordedin the HDD in another recording medium.

[0021] On the other hand, as described above, the copyright holder isnegatively affected when the data recorded in the HDD is copied byignoring the copyright.

[0022] That is to say, in the case that data, for which copyrightprotection is necessary, is recorded in a recording apparatus such as anHDD, there is a problem that the user cannot copy the data to anotherrecording medium.

[0023] In addition, the problem of copyright is taken into considerationwith respect to broadcast programs together with the verification ofbroadcast type such as cable TV or a CS broadcast and digitalization ofsignals and broadcasts of programs are implemented, wherein recordingfor copying is set to be impossible in advance by including a copy guardin signals.

[0024] In a conventional recording and reproduction apparatus, however,a problem arises in that there is a risk that the recording of a programin the recording medium 2130 in order to implement a time shiftreproduction causes an infringement of the copyright with respect to theprogram, when the copyright is taken into consideration as describedabove.

[0025] That is to say, a problem arises in that there is a risk that aninfringement of the copyright with respect to a program, for whichcopyright protection is necessary, may be caused in the case that a timeshift reproduction of the program is implemented.

[0026] As for measures for avoiding such a problem, methods of (1)limiting the times when time shifting is possible, (2) preventing thecontent that is broadcast from being stored in a complete form have beenconsidered, and so on.

DISCLOSURE OF THE INVENTION

[0027] The present invention is provided by taking the above describedproblems into consideration and a purpose thereof is to provide arecording apparatus and a reproduction apparatus that can protect thecopyright in the case where data for which copyright protection isnecessary is recorded, and/or in the case where data for which copyrightprotection is necessary is reproduced.

[0028] In addition, the present invention is provided by taking theabove problems into consideration and a purpose thereof is to provide adata processing apparatus for moving or for copying data, which isprohibited from being copied so as to protect the copyright, to anotherrecording medium, a recording and reproduction apparatus for recordingor reproducing, while recording, data from the above data processingapparatus in a recording medium, an encrypted data decryption recordingapparatus system for backing up data while protecting the copyright anda decryption recording apparatus and a recording apparatus for formingthe above system as well as a data transmission apparatus fortransmitting data while protecting the copyright.

[0029] In addition, the present invention is provided by taking theabove described problems into consideration and a purpose thereof toprovide a recording apparatus and a recording and reproduction apparatuswherein it is possible to avoid copyright infringement in a time shiftreproduction for viewing a program with a delay relative to its originalbroadcast time.

[0030] To solve the above problems, the 1st invention of the presentinvention (corresponding to Claim 1) is a recording apparatuscharacterized by comprising:

[0031] an encryption means of encrypting data sent from an interface;

[0032] a control means of controlling said encrypted data to berecorded; and

[0033] a recording means controlled by said control means of recordingsaid encrypted data on a disk.

[0034] The 2nd invention of the present invention (corresponding toClaim 2) is a recording apparatus according to the 1st invention,characterized in that said encryption means encrypts said data by usinga device unique key that is a numeric value and/or a symbol allocatedto, and specific to, said recording apparatus.

[0035] The 3rd invention of the present invention (corresponding toClaim 3) is a recording apparatus according to the 1st or 2nd invention,characterized in that said encryption means encrypts said data by usingrecording unit information that is a numeral and/or a symbol specific toa recording block corresponding to a recording unit that is a minimumunit for said control means to sequentially access said recording means.

[0036] The 4th invention-of the present invention (corresponding toClaim 4) is a recording apparatus according to the 3rd invention,characterized in that the encryption of said data by using saidrecording unit information indicates the encryption of said data byusing a key gained based on said recording unit information.

[0037] The 5th invention of the present invention (corresponding toClaim 5) is a recording apparatus according to the 3rd or 4th invention,characterized in that at least said encrypted data recorded in saidrecording block and additional information added to said encrypted dataare encrypted in the entire portion and are recorded in said recordingmeans.

[0038] The 6th invention of the present invention (corresponding toClaim 6) is a recording apparatus according to any of the 3rd to 5thinventions, characterized in that:

[0039] copy permission information is added to said data;

[0040] said control means controls said recording means to record saidcopy permission information;

[0041] said encryption means generates first information that includesat least either said device unique key or said copy permissioninformation;

[0042] said encryption means generates, by using said recording unitinformation, a content key that is information gained by encrypting saidfirst information;

[0043] said encryption means encrypts said data by using said contentkey; and

[0044] said control means controls said recording means to record saidencrypted data.

[0045] The 7th invention of the present invention (corresponding toClaim 7) is a recording apparatus according to the 2nd invention,characterized in that:

[0046] a title key that is a numeric value and/or a symbol specific tosaid data is allocated to said data;

[0047] said encryption means encrypts said title key by using saiddevice unique key; and

[0048] said control means controls said recording means so that saidencrypted title key is recorded in said recording means.

[0049] The 8th invention of the present invention (corresponding toClaim 8) is a recording apparatus according to the 7th invention,characterized in that said encryption means encrypts said data by usingsaid title key.

[0050] The 9th invention of the present invention (corresponding toClaim 9) is a recording apparatus according to the 8th invention,characterized in that:

[0051] said encryption means encrypts said title key by using saiddevice unique key;

[0052] said control means controls said recording means to record saidencrypted title key;

[0053] said encryption means generates third information that includessaid title key;

[0054] said encryption means generates a content key, which isinformation gained by encrypting said third information, by usingrecording unit information that is a numeral and/or a symbol specific toa recording block based on a recording unit that is a minimum unit forsaid control means to sequentially access said recording means;

[0055] said encryption means encrypts said data by using said contentkey; and

[0056] said control means controls said recording means to record saidencrypted data.

[0057] The 10th invention of the present invention (corresponding toClaim 10) is a recording apparatus according to the 8th invention,characterized in that:

[0058] copy permission information is added to said data; and

[0059] said encryption means encrypts said data by using said copypermission information.

[0060] The 11th invention of the present invention (corresponding toClaim 11) is a recording apparatus according to the 10th invention,characterized in that:

[0061] said encryption means encrypts said title key by using saiddevice unique key:

[0062] said control means controls said recording means to record saidencrypted title key;

[0063] said control means controls said recording means to record saidcopy permission information;

[0064] said encryption means generates second information that includesat least either the said title key or said copy permission information;

[0065] said encryption means generates a content key that is informationgained by encrypting said second information by using recording unitinformation that is a numeral and/or a symbol specific to a recordingblock based on a recording unit that is a minimum unit for said controlmeans to sequentially access said recording means;

[0066] said encryption means encrypts said data by using said contentkey; and

[0067] said control means controls said recording means to record saidencrypted data.

[0068] The 12th invention of the present invention (corresponding toClaim 12) is a recording apparatus according to the 1st invention,characterized in that:

[0069] said encryption means encrypts data sent from the interface towhich copy permission information is attached by using said copypermission information; and

[0070] said control means controls said recording means to record saidcopy permission information before and/or after said recording meansrecords said data.

[0071] The 13th invention of the present invention (corresponding toClaim 13) is a recording apparatus according to the 12th invention,characterized in that said control means controls said recording meansto record said copy permission information before, at least, saidrecording means records said data.

[0072] The 14th invention of the present invention (corresponding toClaim 14) is a recording apparatus according to the 12th invention,characterized in that said control means controls said recording meansto record said copy permission information only after said recordingmeans records said data.

[0073] The 15th invention of the present invention (corresponding toClaim 15) is a recording apparatus characterized by comprising:

[0074] a control means of controlling encrypted data sent from aninterface to be recorded; and

[0075] a recording means, that is controlled by said control means, ofrecording said encrypted data on a disk.

[0076] The 16th invention of the present invention (corresponding toClaim 16) is a reproduction apparatus characterized by comprising:

[0077] a control means of controlling encrypted data recorded on a diskby means of a recording apparatus according to the 1st invention to bereproduced;

[0078] a reproduction means, which is controlled by said control means,of reproducing said data; and

[0079] a decryption means of decrypting said reproduced data that issent to the interface.

[0080] The 17th invention of the present invention (corresponding toClaim 17) is a reproduction apparatus characterized by comprising:

[0081] a control means of controlling encrypted data recorded on a diskby means of a recording apparatus according to the 2nd invention to bereproduced;

[0082] a reproduction means, that is controlled by said control means,of reproducing said data; and

[0083] a decryption means of decrypting said reproduced data that issent to the interface,

[0084] wherein said decryption means decrypts said reproduced data byusing said device unique key.

[0085] The 18th invention of the present invention (corresponding toClaim 18) is a reproduction apparatus characterized by comprising:

[0086] a control means of controlling encrypted data recorded on a diskby means of a recording apparatus according to the 3rd invention to bereproduced;

[0087] a reproduction means, that is controlled by said control means,of reproducing said data; and

[0088] a decryption means of decrypting said reproduced data that issent to the interface,

[0089] wherein said decryption means decrypts said reproduced data byusing said recording unit information.

[0090] The 19th invention of the present invention (corresponding toClaim 19) is a reproduction apparatus characterized by comprising:

[0091] a control means of controlling encrypted data recorded on a diskby means of a recording apparatus according to the 4th invention to bereproduced;

[0092] a reproduction means, that is controlled by said control means,of reproducing said data; and

[0093] a decryption means of decrypting said reproduced data that issent to the interface,

[0094] wherein said decryption means decrypts said reproduced data byusing a key gained based on said recording unit information.

[0095] The 20th invention of the present invention (corresponding toClaim 20) is a reproduction apparatus characterized by comprising:

[0096] a control means of controlling encrypted data recorded on a diskby means of a recording apparatus according to the 14th invention to bereproduced;

[0097] a reproduction means, which is controlled by said control means,of reproducing said data; and

[0098] a decryption means of decrypting said reproduced data that issent to the interface,

[0099] wherein said decryption means attempts to decrypt the entiretyof, or a portion of, said encrypted data by assuming that said copypermission information has a variety of values in the case that saidcopy permission information cannot be recorded in a normal manner insaid recording means at the time when said data is recorded, and

[0100] wherein said reproduced data is decrypted by using the value ofsaid copy permission information in the case that said reproduced datacan be decrypted in a normal manner as a result of said attempts.

[0101] The 21st invention of the present invention (corresponding toClaim 21) is a reproduction apparatus characterized by comprising:

[0102] a control means of controlling encrypted data recorded on a diskby means of a recording apparatus according to the 15th invention; and

[0103] a reproduction means, which is controlled by said control means,of reproducing said data,

[0104] wherein said reproduced data is sent to the interface.

[0105] The 22nd invention of the present invention (corresponding toClaim 22) is a recording apparatus according to any of the 1st to 14thinvention, characterized in that said interface, said encryption meansand said control means are integrated and provided on the same printedcircuit board.

[0106] The 23rd invention of the present invention (corresponding toClaim 23) is a recording apparatus according to the 22nd invention,characterized in that said interface, said encryption means and saidcontrol means are integrated in one chip.

[0107] The 24th invention of the present invention (corresponding toClaim 24) is a reproduction apparatus according to any of the 16th to20th inventions, characterized in that said interface, said decryptionmeans and said control means are integrated and provided on the sameprinted circuit board.

[0108] The 25th invention of the present invention (corresponding toClaim 25) is a reproduction apparatus according to the 24th invention,characterized in that said interface, said decryption means and saidcontrol means are integrated in one chip.

[0109] The 26th invention of the present invention (corresponding toClaim 26) is a recording apparatus according to the 22nd invention,characterized in that a signal detected from a terminal on said printedcircuit board that outputs a signal that can be reproduced as data by athird party is entirely encrypted and/or is inscribed in an undisclosedformat.

[0110] The 27th invention of the present invention (corresponding toClaim 27) is a reproduction apparatus according to the 24th invention,characterized in that a signal detected from a terminal on said printedcircuit board that outputs a signal that can be reproduced as data by athird party is entirely encrypted and/or is inscribed in an undisclosedformat.

[0111] The 28th invention of the present invention (corresponding toClaim 28) is a recording apparatus according to the 22nd invention,characterized in that the property of a terminal on said printed circuitboard that outputs a signal that can be reproduced as data by a thirdparty is defined according to an undisclosed format.

[0112] The 29th invention of the present invention (corresponding toClaim 29) is a reproduction apparatus according to the 24th invention,characterized in that the property of a terminal on said printed circuitboard that outputs a signal that can be reproduced as data by a thirdparty is defined according to an undisclosed format.

[0113] The 30th invention of the present invention (corresponding toClaim 30) is a recording apparatus according to any of the 2nd to 11thinventions, characterized in that said device unique key cannot beaccessed by an external device.

[0114] The 31st invention of the present invention (Corresponding toClaim 31) is a recording apparatus according to any of the 6th, 10th,11th, 12th, 13th and 14th inventions, characterized in that said copypermission information is recorded in a system region that cannot bedirectly accessed by a user of said recording means.

[0115] The 32nd invention of the present invention (corresponding toClaim 32) is a recording apparatus according to any of the 1st to 15th,22nd, 23rd, 26th, 28th, 30th and 31st inventions, characterized in that:

[0116] copy permission information is added to the data sent from saidinterface; and

[0117] said control means can control said recording means to recordsaid data even in the case that said copy permission information of saiddata represents “Copy Never” according to a predetermined condition.

[0118] The 33rd invention of the present invention (corresponding toClaim 33) is a recording apparatus according to the 32nd invention,characterized in that said predetermined condition is the case whereinsaid recorded data becomes unreproducible after a predetermined periodof time.

[0119] The 34th invention of the present invention (corresponding toClaim 34) is a recording apparatus according to the 32nd invention,characterized in that said predetermined condition is the case whereinsaid recorded data becomes unreproducible according to fee impositionconditions.

[0120] The 35th invention (corresponding to Claim 35) is a reproductionapparatus according to any of the 16th to 21st, 24th, 25th, 27th and29thinventions, characterized in that:

[0121] copy permission information is added to said encrypted data thatis recorded: and

[0122] said control means controls said reproduction means to reproducesaid data at least one time in the case that said copy permissioninformation of said data represents “Copy Never” according to apredetermined condition.

[0123] The 36th invention of the present invention (corresponding toClaim 36) is a reproduction apparatus according to the 35th invention,characterized in that said predetermined condition is the case whereinsaid recorded data becomes unreproducible after a predetermined periodof time.

[0124] The 37th invention of the present invention (corresponding toClaim 37) is a reproduction apparatus according to the 35th invention,characterized in that said predetermined condition is the case whereinsaid recorded data becomes unreproducible according of fee impositionconditions.

[0125] The 38th invention of the present invention (corresponding toClaim 38) is a reproduction apparatus according to any of the 16th to21st, 24th, 25th, 27th and 29th inventions, characterized in that:

[0126] copy permission information is added to said encrypted data thatis recorded; and

[0127] said control means controls said reproduction means to copy andto output said data only once so as to allow said copy permissioninformation of said data, after being once copied by means of saidrecording means, to permit copying only one additional time (copy once)in the case that said copy permission information of said datarepresents the permission of copying only one (copy once) according to apredetermined condition.

[0128] The 39th invention of the present invention (corresponding toClaim 39) is a reproduction apparatus according to the 38th invention,characterized in that said predetermined condition is the case whereinsaid data or the key used for encrypting said data are erased after apredetermined period of time has elapsed since said reproduction meanshas copied and outputted said data.

[0129] The 40th invention of the present invention (corresponding toClaim 40) is a reproduction apparatus according to the 38th invention,characterized in that said predetermined condition is the case wherein arecorder of said data that has been only once copied and outputted is anapparatus for recording said data as a backup.

[0130] The 41st invention of the present invention (corresponding toClaim 41) is a reproduction apparatus according to the 40th invention,characterized in that said data recorded as a backup in said recorder isunreproducible from said recorder.

[0131] The 42nd invention of the present invention (corresponding toClaim 42) is a reproduction apparatus according to the 40th invention,characterized in that said data recorded as a backup in said recorder isunreproducible unless said data is returned to the original reproductionapparatus.

[0132] The 43rd invention of the present invention (corresponding toClaim 43) is a recording apparatus according to any of the 1st to 14th,22nd, 23rd, 26th and 30th to 34th inventions characterized in that saidencryption means encrypts data regardless of the value of the copypermission information of said data sent from said interface.

[0133] The 44th invention of the present invention (corresponding toClaim 44) is a recording apparatus according to any of the 1st to 14th,22nd, 23rd, 26th and 30th to 34th inventions characterized in that:

[0134] said encryption means does not encrypt said data in the case thatcopy permission information of the data sent from said interfacerepresents that the data can be freely copied (copy free); and

[0135] said control means controls said recording means to record saidunencrypted data.

[0136] The 45th invention of the present invention (corresponding toClaim 45) is a data processing apparatus comprising at least a movemeans of moving data that is recorded in a recording medium forrecording data to another recording apparatus, characterized in that, inthe case that data that is attempted to be moved by said move means iscopy prohibited data prohibited from being copied, the copy prohibiteddata is encrypted by using an encryption key specific to said dataprocessing apparatus when at least being outputted from said dataprocessing apparatus.

[0137] The 46th invention of the present invention (corresponding toClaim 46) is a data processing apparatus comprising at least a copyingmeans of copying data that is recorded on a recording medium forrecording data into another recording apparatus, characterized in that,in the case that data that is attempted to be copied by said copyingmeans is copy permission information that is prohibited from beingcopied, the copy prohibited data is encrypted by using an encryption keyspecific to said data processing apparatus when at least being outputtedfrom said data processing apparatus.

[0138] The 47th invention of the present invention (corresponding toClaim 47) is a data processing apparatus according to the 45th or 46thinvention, characterized by further comprising an encryption means ofencrypting said copy prohibited data by using said encryption key.

[0139] The 48th invention of the present invention (corresponding toClaim 48) is a data processing apparatus according to any of the 45th to47th inventions, characterized by further comprising a reproductionmeans of decryption, by using said encryption key, said copy prohibiteddata encrypted using said encryption key and of reproducing said copyprohibited data.

[0140] The 49th invention of the present invention (corresponding toClaim 49) is a data processing apparatus according to the 48thinvention, characterized in that:

[0141] said reproduction means is a means of reproducing said copyprohibited data at a rate required at the time of viewing and listeningby the user;

[0142] a storage means of storing said copy prohibited data that hasbeen transmitted at a rate faster, than said rate that is required atthe time of viewing and listening by the user in the case that said copyprohibited data encrypted using said encryption key is transmitted at arate faster than said rate required at the time of viewing and listeningby the user from said other recording apparatus is provided; and

[0143] said reproduction means can reproduce said copy prohibited datastored in said storage means or data stored in said storage means inadvance at the time when said storage means stores said copy prohibiteddata from said other recording apparatus.

[0144] The 50th invention of the present invention (corresponding toClaim 50) is a data processing apparatus according to any of the 45th to49th inventions, characterized in that:

[0145] said other recording apparatus is an apparatus that can recorddata in a second recording medium;

[0146] a judgment means of judging whether or not said second recordingmedium is a recording medium corresponding to said data processingapparatus is further provided; and

[0147] said move means or said copying means moves or copies said copyprohibited data in the case that said second recording medium is judgedto be a recording medium corresponding to said data processing apparatusby said judgment means.

[0148] The 51st invention of the present invention (corresponding toClaim 51) is a data processing apparatus according to any of the 45th to49th inventions, characterized in that:

[0149] said other recording apparatus is an apparatus that can recorddata in a second recording medium;

[0150] a judgment means of judging whether or not said other recordingapparatus is an apparatus corresponding to said data processingapparatus is further provided; and

[0151] said move means or said copying means moves or copies said copyprohibited data in the case that said other recording apparatus is anapparatus corresponding to said data processing apparatus by saidjudgment means.

[0152] The 52nd invention of the present invention (corresponding toClaim 52) is a data processing apparatus according to any of the 45th to51st inventions, characterized in that said move means or said copyingmeans outputs said copy prohibited data as data that can be copied onlyonce when said copy prohibited data is moved or is copied.

[0153] The 53rd invention of the present invention (corresponding toClaim 53) is a recording and reproduction apparatus, characterized bycomprising a recording means of recording said copy prohibited data thatis encrypted using said encryption key from a data processing apparatusaccording to any of the 45th to 47th inventions in a second recordingmedium.

[0154] The 54th invention of the present invention (corresponding toClaim 54) is a recording and reproduction apparatus, characterized bycomprising:

[0155] a recording means of recording said copy prohibited data that isencrypted using said encryption key from a data processing apparatusaccording to the 48th invention in a second recording medium; and

[0156] a transmission means of transmitting said copy prohibited datathat is recorded in said second recording medium and that is encryptedusing said encryption key to said data processing apparatus while stillencrypted using said encryption key.

[0157] The 55th invention of the present invention (corresponding toClaim 55) is a recording and reproduction apparatus, characterized bycomprising:

[0158] a recording means of recording said copy prohibited data that isencrypted using said encryption key from a data processing apparatusaccording to the 50th or 51st invention in said second recording medium;and

[0159] a transmission means of transmitting said copy prohibited datathat is recorded in said second recording medium and that is encryptedusing said encryption key to said data processing apparatus while stillencrypted using said encryption key.

[0160] The 56th invention of the present invention (corresponding toClaim 56) is a recording and reproduction apparatus, characterized bycomprising:

[0161] a recording means of recording said copy prohibited dataencrypted using said encryption key from a data processing apparatusaccording to any of the 45th, 46th, 47th, 50th and 51st invenitons in asecond recording medium; and

[0162] a decryption and reproduction means of decrypting, by using saidencryption key, said copy prohibited data that is recorded in saidsecond, recording medium and that is encrypted using said encryption keyand of reproducing said copy prohibited data.

[0163] The 57th invention of the present invention (corresponding toClaim 57) is a recording and reproduction apparatus according to the56th invention, characterized by further comprising:

[0164] a key reproduction means of reproducing an encrypted keyrecording medium wherein said encryption key is recorded; and

[0165] a key storage means of storing said encryption key reproduced bysaid key reproduction means,

[0166] wherein said decryption and reproduction means reproduces saidcopy prohibited data by utilizing said encryption key stored by said keystorage means.

[0167] The 58th invention of the present invention (corresponding toClaim 58) is a recording and reproduction apparatus according to the56th invention, characterized by further comprising a reception means ofreceiving said encryption key that is transmitted from said dataprocessing apparatus,

[0168] wherein said decryption and reproduction means reproduces saidcopy prohibited data by utilizing said encryption key received by saidreception means.

[0169] The 59th invention of the present invention (corresponding toClaim 59) is a data processing apparatus, characterized by comprising atleast a move means of moving data that is recorded in a recording mediumfor recording data to another recording apparatus as data in a formatthat can be decrypted in the other recording apparatus,

[0170] wherein data that is attempted to be moved by said move means iscopy prohibited data that is prohibited from being copied.

[0171] The 60th invention of the present invention (corresponding toClaim 60) is a data processing apparatus, characterized by comprising atleast a copying means of copying data that is recorded in a recordingmedium for recording data in another recording apparatus as data in aformat that can be decrypted in the other recording apparatus,

[0172] wherein data that is attempted to be copied by said copying meansis copy prohibited data that is prohibited from being copied.

[0173] The 61st invention of the present invention (corresponding toClaim 64) is a data processing apparatus according to the 59th or 60thinvention, characterized in that the data in a format that can bedecrypted in said other recording apparatus means plain sentence data,data that is encrypted using a key specific to said other recordingapparatus or data that is encrypted using a key attached to a secondrecording medium in said other recording apparatus.

[0174] The 62nd invention of the present invention (corresponding toClaim 62) is a data processing apparatus according to the 61stinvention, characterized in that the data in a format that can bedecrypted in said other recording apparatus is also data in a formatused in said other recording apparatus.

[0175] The 63rd invention of the present invention (corresponding toClaim 63) is a processing apparatus according to any of the 59th to 62ndinveniotns, characterized in that:

[0176] said other recording apparatus is an apparatus that can recorddata in said recording medium;

[0177] a judgment means of judging whether or not said second recordingmedium corresponds to said data processing apparatus is furtherprovided; and

[0178] said move means or said copying means moves or copies said copyprohibited data in the case that said second recording medium is judgedto be a recording medium corresponding to said data processing apparatusaccording to said judgment means.

[0179] The 64th invention of the present invention (corresponding toClaim 64) is a data processing apparatus according to the 63rdinvention, characterized in that:

[0180] said judgment means carries out said judgment by using said keyin the case that a key indicating that said second recording medium is arecording medium corresponding to said data processing apparatus isattached to said second recording medium;

[0181] an encryption means of encrypting said copy prohibited data byusing said key in the case that said second recording medium is judgedto be a recording medium corresponding to said data processing apparatusby said judgment means is further provided; and

[0182] said move means or said copying means moves or copies saidencrypted copy prohibited data.

[0183] The 65th invention of the present invention (corresponding toClaim 63) is a data processing apparatus according to any of the 59th to62nd inventions, characterized in that:

[0184] said other recording apparatus is an apparatus that can recorddata in a second recording medium;

[0185] a judgment means of judging whether or not said other recordingapparatus is an apparatus corresponding to said data processingapparatus is further provided; and

[0186] said move means or said copying means moves or copies said copyprohibited data in the case that said other recording apparatus isjudged to be an apparatus corresponding to said data processingapparatus by said judgment means.

[0187] The 66th invention of the present invention (corresponding toClaim 66) is a data processing apparatus according to the 65thinvention, characterized in that:

[0188] in the case that said judgment means has a key that indicatesthat said other recording apparatus is an apparatus corresponding tosaid data processing apparatus, said judgment means carries out saidjudgment by using said key;

[0189] an encryption means of encrypting said copy prohibited data byusing said key, in the case that said other recording apparatus isjudged to be an apparatus corresponding to said data processingapparatus by said judgment means, is further provided; and

[0190] said move means or said copying means moves or copies saidencrypted copy prohibited data.

[0191] The 67th invention of the present invention (corresponding toClaim 67) is a data processing apparatus according to any of the 59th to66th inventions, characterized in that said move means or said copyingmeans outputs said copy prohibited data as data that can be copied onlyonce when said copy prohibited data is moved or copied.

[0192] The 68th invention of the present invention (corresponding toClaim 68) is a recording and reproduction apparatus for recording saidcopy prohibited data, from a data processing apparatus according to the59th or 60th invention, in a second recording medium and for reproducingsaid copy prohibited data from said second recording medium,

[0193] wherein said copy prohibited data is plain sentence data, and

[0194] wherein said recording and reproduction apparatus ischaracterized by comprising:

[0195] an encryption means of encrypting said copy prohibited data byusing an encryption key attached to said second recording medium or byusing an encryption key specific to said recording and reproductionapparatus;

[0196] a recording means of recording said copy prohibited dataencrypted by said encryption means in said second recording medium; and

[0197] a reproduction means of decrypting said encrypted copy prohibiteddata that is recorded in said second recording medium by utilizing saidkey so as to reproduce said copy prohibited data.

[0198] The 69th invention of the present invention (corresponding toClaim 69) is a recording and reproduction apparatus for recording saidcopy prohibited data, from a data processing apparatus according tothe59th or 60th invention, in a second recording medium and forreproducing said copy prohibited data from said second recording medium,

[0199] wherein said copy prohibited data is data encrypted by a keyspecific to said recording and reproduction apparatus or data encryptedby using a key attached to said second recording medium,

[0200] wherein said recording and reproduction apparatus ischaracterized by comprising:

[0201] a recording means of recording said encrypted copy prohibiteddata in said second recording medium; and

[0202] a reproduction means of decrypting said encrypted copy prohibiteddata that is recorded in said second recording medium by utilizing saidkey so as to reproduce said copy prohibited data.

[0203] The 70th invention of the present invention (corresponding toClaim 70) is a data processing apparatus according to any of the 45th,46th, 47th, 48th, 49th, 50th, 51st, 52nd, 59th, 60th, 61st, 62nd, 63rd,64th, 65th, 66th and 67th inventions, characterized by furthercomprising a fee imposition information transmission means oftransmitting fee imposition information with respect to move or copyingof said data to a management apparatus for managing said data processingapparatus when said move means carries out the move of said data or whensaid copying means carries out the copying of said data.

[0204] The 71st invention of the present invention (corresponding toClaim 71) is a data processing apparatus according to any of the 45th,46th, 47th, 48th, 49th, 50th, 51st, 52nd, 59th, 60th, 61st, 62nd, 63rd,64th, 65th, 66th and 67th inventions, characterized in that said movemeans moves said copy prohibited data to, or said copying means copiessaid copy prohibited data into, said other recording apparatus when atleast a management apparatus, which has the ability of imposing a fee onthe move or on the copying of said copy prohibited data, is confirmed tobe connected to an interface to which said data processing apparatus andsaid other recording apparatus are connected.

[0205] The 72nd invention of the present invention (corresponding toClaim 72) is an encrypted data decrypting and recording apparatus systemcharacterized by comprising:

[0206] a plurality of recording apparatuses that respectively recordencrypted copy prohibited data, of which the content is identical, thatis prohibited from being copied; and

[0207] a decrypting and recording apparatus having a decryption means ofdecrypting said encrypted copy prohibited data that is outputted fromsaid plurality of recording apparatuses and a recording means ofrecording encrypted, or unencrypted, copy prohibited data, of which thecontent is identical to said copy prohibited data.

[0208] The 73rd invention of the present invention (corresponding toClaim 73) is a decrypting and recording apparatus, characterized bycomprising:

[0209] a decryption means of decrypting encrypted copy prohibited data,which is prohibited from being copied and which is outputted from aplurality of recording apparatuses in which said encrypted copyprohibited data, of which the content is identical, is respectivelyrecorded; and

[0210] a recording means of recording encrypted, or unencrypted, copyprohibited data, of which the content is identical to that of said copyprohibited data.

[0211] The 74th invention of the present invention (corresponding toClaim 74) is a recording apparatus, characterized by being one of aplurality of recording apparatuses that respectively record encryptedcopy prohibited data, of which the content is identical, that isprohibited from being copied,

[0212] wherein said recording apparatus comprises a recording means ofrecording said encrypted copy prohibited data and an output means ofoutputting said encrypted copy prohibited data that is recorded in saidrecording means, and

[0213] wherein said encrypted copy prohibited data outputted from saidoutput means is data that can only be decrypted in a decrypting andrecording apparatus having at least a decryption means of decryptingsaid encrypted copy prohibited data.

[0214] The 75th invention of the present invention (corresponding toClaim 75) is a data transmission apparatus characterized by comprising atransmission means of transmitting a stream formed of a plurality ofpieces of data,

[0215] wherein each of said pieces of data in said stream, or withineach of blocks forming said stream, is data that cannot be reproducedunless the piece of data chronologically positioned one position beforesaid data is reproduced, and

[0216] wherein said transmission means transmits each piece of saiddata, of data in said stream, or each of the blocks forming said stream,in the order of from the rear toward the head in a chronological manner.

[0217] The 76th invention of the present invention (corresponding toClaim 76) is a recording apparatus for allowing copy restricted content,comprising data that is set so as to be prohibited from, or restrictedfrom, being copied, to become reproducible in a time shift manner,characterized by comprising:

[0218] a recording medium wherein a predetermined capacity of recordingof said copy restricted content is possible; and

[0219] a recording means of recording data in said recording medium,

[0220] wherein said recording means records said copy restricted contentin said recording medium and allows data of said copy restricted contentrecorded in said recording medium to convert to the condition whereinviewing and listening is impossible after a predetermined period of timehas elapsed since the time the recording of said copy restricted contenthas started.

[0221] The 77th invention of the present invention (corresponding toClaim 77) is a recording apparatus according to the 76th invention,characterized in that said condition wherein viewing and listening isimpossible is implemented by erasing the data of said copy restrictedcontent.

[0222] The 78th invention of the present invention (corresponding toClaim 78) is a recording apparatus according to the 76th invention,characterized in that said condition wherein viewing and listening isimpossible is implemented by not erasing the data of said copyrestricted content.

[0223] The 79th invention of the present invention (corresponding toClaim 79) is a recording apparatus according to the 76th invention,characterized in that said condition wherein viewing and listening isimpossible is implemented by allowing the data of said copy restrictedcontent to become unreproducible.

[0224] The 80th invention of the present invention (corresponding toClaim 80) is a recording apparatus according to the 79th invention,characterized in that said condition wherein viewing and listening isimpossible is implemented by encrypting the data of said copy restrictedcontent after reproduction.

[0225] The 81st invention of the present invention (corresponding toClaim 81) is a recording apparatus according to any of the 76th to 80thinventions, characterized in that the timing according to which saidrecording means starts the recording of said copy restricted content isdefined by referring to judgment information in conjunction with saidcopy restricted content.

[0226] The 82nd invention of the present invention (corresponding toClaim 82) is a recording apparatus according to the 81st invention,characterized in that said recording means carries out recording bydifferentiating said copy restricted content from other content by usingsaid judgment information.

[0227] The 83rd invention of the present invention (corresponding toClaim 83) is a recording apparatus according to the 81st invention,characterized in that said judgment information is copyright informationincluded in a data column of said copy restricted content

[0228] The 84th invention of the present invention (corresponding toClaim 84) is a recording apparatus according to any of the 76th to 82ndinventions, characterized in that the timing according to which saidrecording means starts the recording of said copy restricted content isdefined based on an input from the outside.

[0229] The 85th invention of the present invention (corresponding toClaim 85) is a recording apparatus according to any of the 76th to 80thinventions, characterized in that said recording medium has a recordingbuffer for temporarily recording said copy restricted content.

[0230] The 86th invention of the present invention (corresponding toClaim 86) is a recording apparatus according to the 85th invention,characterized in that said recording buffer is a ring buffer wherein itis possible to record a constant amount of data by repeating overwritingrecording in the same region.

[0231] The 87th invention of the present invention (corresponding toClaim 87) is a recording and reproduction apparatus characterized bycomprising:

[0232] a recording apparatus according to any of the 76th to 85thinventions; and

[0233] a reproduction means of reproducing data recorded in saidrecording medium,

[0234] wherein said reproduction means reproduces said copy restrictedcontent that has been recorded after a predetermined period of standbytime has elapsed since the time of the start of the recording of saidcopy restricted content.

[0235] The 88th invention of the present invention (corresponding toClaim 88) is a recording and reproduction apparatus characterized bycomprising:

[0236] a recording apparatus according to the 86th invention; and

[0237] a reproduction means of reproducing data recorded in saidrecording medium,

[0238] wherein said reproduction means reproduces said copy restrictedcontent that has been recorded after a predetermined period of standbytime has elapsed since the time of the start of the recording of saidcopy restricted content.

[0239] The 89th invention of the present invention (corresponding toClaim 89) is a recording and reproduction apparatus according to Claim88, characterized in that, at the time when said reproduction meanscarries out a reproduction operation under the condition whereinoverwriting recording is being carried out in said ring buffer, thereproduction of said data is carried out starting from the positionwhere the oldest piece of data is recorded in said ring buffer.

[0240] The 90th invention of the present invention (corresponding toClaim 90) is a recording and reproduction apparatus according to the89th invention, characterized in that, at the time when saidreproduction means carries out a reproduction operation under thecondition wherein overwriting recording is not carried out in said ringbuffer, the reproduction of said data is carried out starting from therecording start position on said ring buffer.

[0241] The 91st invention of the present invention (corresponding toClaim 91) is a recording and reproduction apparatus according to the87th or 88th invention, characterized in that, in the case that copyrestricted content recorded in said recording medium is not reproducedwithin said predetermined period of standby time, said recordingapparatus stops the recording operation of said copy restricted content.

[0242] The 92nd invention of the present invention (corresponding toClaim 92) is a recording and reproduction apparatus according to the87th or 88th invention, characterized by further comprising anotification means of making a notification of operational content ofsaid recording apparatus or of said reproduction means in advance basedon either said predetermined period of time or based on saidpredetermined period of standby time.

[0243] The 93rd invention of the present invention (corresponding toClaim 93) is a recording apparatus according to the 76th invention,characterized in that said recording means can measure time informationincluding said predetermined period of time.

[0244] The 94th invention of the present invention (corresponding toClaim 94) is a recording apparatus according to the 76th invention,characterized in that said copy restricted content includes timeinformation including said predetermined period of time.

[0245] The 95th invention of the present invention (corresponding toClaim 95) is a recording apparatus according to the 76th invention,characterized in that the time information including said predeterminedperiod of time is gained from the outside independently of said copyrestricted content.

[0246] In addition, the 96^(th) aspect of the invention is areproduction apparatus characterized by comprising:

[0247] a control means of carrying out control so as to reproduceencrypted data that is recorded on a disk by a recording apparatusaccording to the sixth aspect of the invention;

[0248] a reproduction means, controlled by said control means, ofreproducing said data; and

[0249] a decryption means of decrypting said reproduced data that issent to an interface,

[0250] wherein said control means controls said recording means so thatsaid recording means reproduces said copy permission information;

[0251] said decryption means generates first information that includesat least any of said device unique key and said copy permissioninformation;

[0252] said decryption means generates a content key that is informationgained by decrypting said first information by using said recording unitinformation; and

[0253] said decryption means decodes said data by using said contentkey.

[0254] In addition, the 97^(th) aspect of the invention is areproduction apparatus characterized by comprising:

[0255] a control means of carrying out control so as to reproduceencrypted data recorded on a disk by a recording apparatus according tothe seventh aspect of the invention;

[0256] are production means, controlled by said control means, ofreproducing said data; and

[0257] a decryption means of decrypting said reproduced data that issent to an interface,

[0258] wherein said control means controls said recording means so thatsaid recording means reproduces said encrypted title key; and

[0259] said decryption means decrypts said encrypted title key by usingsaid device unique key.

[0260] In addition, the 98^(th) aspect of the invention is areproduction apparatus characterized by comprising:

[0261] a control means of carrying out control so as to reproduceencrypted data recorded on a disk by a recording apparatus according tothe eighth aspect of the invention;

[0262] are production means, controlled by said control means, ofreproducing said data; and

[0263] a decryption means of decrypting said reproduced data that issent to an interface,

[0264] wherein said decryption means decrypts said data by using saidtitle key.

[0265] In addition, the 99^(th) aspect of the invention is areproduction apparatus characterized by comprising:

[0266] a control means of carrying out control so as to reproduceencrypted data recorded on a disk by a recording apparatus according tothe ninth aspect of the invention;

[0267] a reproduction means, controlled by said control means, ofreproducing said data; and

[0268] a decryption means of decrypting said reproduced data that issent to an interface,

[0269] wherein said control means controls said recording means so thatsaid recording means reproduces said encrypted title key;

[0270] said decryption means decrypts said reproduced title key by usingsaid device unique key;

[0271] said decryption means generates third information including saidtitle key;

[0272] by using recording unit information that is a numeral and/or asymbol inherent to a recording block under the premise of a recordingunit that is the minimum unit when said control means sequentiallyaccesses said recording means, said decryption means generates a contentkey that is information gained by decrypting said third information; and

[0273] said decryption means decrypts said data by using said contentkey.

[0274] In addition, the 100^(th) aspect of the invention is areproduction apparatus characterized by comprising:

[0275] a control means of carrying out control so as to reproduceencrypted data recorded on a disk by a recording apparatus according tothe 10_(th) aspect of the invention;

[0276] a reproduction means, controlled by said control means, ofreproducing said data; and

[0277] a decryption means of decrypting said reproduced data that issent to an interface,

[0278] wherein said decryption means decrypts said data by using saidcopy permission information.

[0279] In addition, the 101^(st) aspect of the invention is areproduction apparatus characterized by comprising:

[0280] a control means of carrying out control so as to reproduceencrypted data recorded on a disk by a recording apparatus according tothe 11^(th) aspect of the invention;

[0281] are production means, controlled by said control means, ofreproducing said data; and

[0282] a decryption means of decrypting said reproduced data that issent to an interface,

[0283] wherein said control means controls said recording means so thatsaid recording means reproduces said encrypted title key,

[0284] wherein said decryption means decrypts said reproduced title keyby using said device unique key;

[0285] said control means controls said recording means so that saidrecording means reproduces said copy permission information;

[0286] said decryption means generates second information including, atleast, any of said title key and said copy permission information; and

[0287] wherein by using recording unit information that is a numeraland/or a symbol inherent to a recording block under the premise of arecording unit that is the minimum unit when said control meanssequentially accesses said recording means, said decryption meansgenerates a content key that is information gained by decrypting saidsecond information; and

[0288] said decryption means decrypts said data by using said contentkey.

[0289] In addition, the 102^(nd) aspect of the invention is areproduction apparatus characterized by comprising:

[0290] a control means of carrying out control so as to reproduceencrypted data recorded on a disk by a recording apparatus according tothe twelfth or thirteenth aspect of the invention:

[0291] are production means, controlled by said control means, ofreproducing said data; and

[0292] a decryption means of decrypting said reproduced data that issent to an interface,

[0293] wherein said control means controls said recording means so as toreproduce said copy permission information; and

[0294] said decryption means decrypts said data by using said reproducedcopy permission information.

[0295] In addition, the 103^(rd) aspect of the invention is a mediumcharacterized by being a medium that holds a program and/or data forallowing a computer to carry out the entirety, or a part of, functionsof the entirety, or a part of, any of the first to 102^(nd) aspects ofthe invention and that can be processed by a computer.

[0296] In addition, the 104^(th) aspect of the invention is aninformation assembly characterized by being a program and/or data forallowing a computer to carry out the entirety, or a part of, functionsof the entirety, or a part of, any of the first to 102^(nd) aspects ofthe invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0297]FIG. 1 is a block diagram showing the configuration of a hard diskapparatus according to the first, second, fourth to sixth embodiments ofthe present invention;

[0298]FIG. 2 is a diagram for describing a summary of the functions ofthe hard disk apparatus according to the first embodiment of the presentinvention;

[0299]FIG. 3 is a block diagram showing the configuration of anencryption means of the hard disk apparatus according to the firstembodiment of the present invention;

[0300]FIG. 4 is a block diagram showing the configuration of adecryption means of the hard disk apparatus according to the firstembodiment of the present invention;

[0301]FIG. 5(a) is a flow chart showing the operation at the time ofrecording of the hard disk apparatus according to the first embodimentof the present invention;

[0302]FIG. 5(b) is a schematic diagram showing the operationalassociations at the time of the recording of the hard disk apparatusaccording to the first embodiment of the present invention;

[0303]FIG. 6(a) is a flow chart showing the operation at the time ofreproduction of the hard disk apparatus according to the firstembodiment of the present invention;

[0304]FIG. 6(b) is a schematic diagram showing the operationalassociations at the time of reproduction of the hard disk apparatusaccording to the first embodiment of the present invention;

[0305]FIG. 7(a) is a diagram for describing a recording format used bythe hard disk apparatus according to the first embodiment of the presentinvention;

[0306]FIG. 7(b) is a diagram showing an example of a format that differsfrom the format of FIG. 7(a);

[0307]FIG. 8 is a diagram that describes the values of CCI and themeanings thereof;

[0308]FIG. 9 is a diagram for describing a magnetic disk format used forrecording and reproduction by the hard disk apparatus according to thefirst embodiment of the present invention;

[0309]FIG. 10 is a block diagram showing the configuration of a harddisk apparatus according to the third embodiment of the presentinvention;

[0310]FIG. 11 is a block diagram showing the configuration of anencryption means of the hard disk apparatus according to the fourthembodiment of the present invention;

[0311]FIG. 12 is a block diagram showing the configuration of adecryption means of the hard disk apparatus according to the fourthembodiment of the present invention;

[0312]FIG. 13 is a block diagram showing the configuration of anencryption means of the hard disk apparatus according to the fifthembodiment of the present invention;

[0313]FIG. 14 is a block diagram showing the configuration of adecryption means of the hard disk apparatus according to the fifthembodiment of the present invention;

[0314]FIG. 15 is a block diagram showing the configuration of anencryption means of the hard disk apparatus according to the sixthembodiment of the present invention;

[0315]FIG. 16 is a block diagram showing the configuration of adecryption means of the hard disk apparatus according to the sixthembodiment of the present invention;

[0316]FIG. 17(a) is a block diagram showing the configuration of anencryption means of a hard disk apparatus according to an embodiment ofthe present invention;

[0317]FIG. 17(b) is a block diagram showing the configuration of adecryption means of a hard disk apparatus according to an embodiment ofthe present invention;

[0318]FIG. 18(a) is a block diagram showing the configuration of anencryption means of a hard disk apparatus according to an embodiment ofthe present invention;

[0319]FIG. 18(b) is a block diagram showing the configuration of adecryption means of a hard disk apparatus according to an embodiment ofthe present invention;

[0320]FIG. 19(a) is a block diagram showing the configuration of anencryption means of a hard disk apparatus according to an embodiment ofthe present invention;

[0321]FIG. 19(b) is a block diagram showing the configuration of adecryption means of a hard disk apparatus according to an embodiment ofthe present invention;

[0322]FIG. 20 is a block diagram showing the configuration of a harddisk apparatus according to the seventh embodiment of the presentinvention;

[0323]FIG. 21 is a block diagram of an AVHDD1 and an archive device 2according to Embodiment 1 of the present invention;

[0324]FIG. 22 is a block diagram of an AVHDD12 and an archive device 13according to Embodiment 1 of the present invention;

[0325]FIG. 23 is a block diagram of an archive device 16 according toEmbodiment 1 of the present invention;

[0326]FIG. 24 is a block diagram of an AVHDD19 and the archive device 2according to Embodiment 1 of the present invention;

[0327]FIG. 25 is a block diagram of an AVHDD22 and an archive device 23according to Embodiment 2 of the present invention;

[0328]FIG. 26 is a block diagram of an AVHDD32 and a DVD apparatus 33according to Embodiment 4 of the present invention;

[0329]FIG. 27 is a configuration diagram of a stream according toEmbodiment 4 of the present invention;

[0330]FIG. 28 is a block diagram of an AVHDD81 with a copying means 80according to Embodiment 1 of the present invention;

[0331]FIG. 29 is a block diagram of an AVHDD91 with a copying means 90according to Embodiment 2 of the present invention;

[0332]FIG. 30 is a block diagram of an encrypted data decryptionrecording system according to Embodiment 3 of the present invention;

[0333]FIG. 31 is a block diagram of a recording apparatus 100 accordingto Embodiment 3 of the present invention;

[0334]FIG. 32 is a block diagram of a decryption recording apparatus 101according to Embodiment 3 of the present invention;

[0335]FIG. 33 is a configuration diagram of a recording and reproductionapparatus according to Embodiment 1 of the present invention;

[0336]FIG. 34 is a time chart for describing the operation of arecording and reproduction apparatus according to Embodiment 1 of thepresent invention;

[0337]FIG. 35 is a time chart for describing the operation of arecording and reproduction apparatus according to Embodiment 1 of thepresent invention;

[0338]FIG. 36 is a configuration diagram of a recording and reproductionapparatus according to Embodiment 2 of the present invention;

[0339]FIG. 37 is a time chart for describing the operation of arecording and reproduction apparatus according to Embodiment 2 of thepresent invention;

[0340]FIG. 38 is a time chart for describing the operation of arecording and reproduction apparatus according to Embodiment 2 of thepresent invention;

[0341]FIG. 39 is a time chart for describing the operation of arecording and reproduction apparatus according to Embodiment 3 of thepresent invention;

[0342]FIG. 40 is a configuration diagram of a recording and reproductionapparatus according to Embodiment 4 of the present invention;

[0343]FIG. 41 is a configuration diagram of a recording and reproductionapparatus according to Embodiment 5 of the present invention;

[0344]FIG. 42 is a diagram for describing the operation of a recordingand reproduction apparatus according to Embodiment 5 of the presentinvention; and

[0345]FIG. 43 is a configuration diagram of a recording and reproductionapparatus for carrying out a time shift reproduction according to aprior art. Explanation of Numerals 1 IEEE1394 bus 2 hard disk apparatus3 host system 4 I/F 10 controller 11 encryption means 12 decriptionmeans 13 device unique key 14 control means 15 recording means 16 I/F 17encrypted content 18 secret region 19 encryptor 22 adder 23 title key 24CCI 25 recording unit number 26 content 27 CCI 28 encrypted title key 29magnetic disk medium 31 decryptor 32 decryptor 33 decryptor 34 adder 35title key 36 CCI 37 decrypted content 39 recording unit 41 format 47hard disk apparatus 51 controller 1001, 1012, 1019, 1022, 1032 AVHDD1002, 1013, 1016, 1023 archive device 1003 STB 1004, 1028 encryptionmeans 1005 first recording means 1006, 1025, 1034 storage means 1007,1027 move means 1008, 1031, 1038 reproduction means 1009 secondrecording means 1010, 1021 second recording medium 1011, 1035transmission means 1014 buffer 1015 high speed transmission means 1017decryption reproduction means 1018 IC card 1020 judgment means 1024third recording means 1026 sentence simplification means 1029 fourthrecording means 1030 third recording medium 1033 DVD apparatus 1036fifth recording means 1037 DVD 2010 discrimination information detectionmeans 2011 time information acquisition means 2012 recording andreproduction means 2013 recording medium 2014 recording buffer 2015control input I/F 2016 switching means

PREFERRED EMBODIMENTS FOR CARRYING OUT THE INVENTION

[0346] In the following, embodiments of the present invention aredescribed with respect to the drawings.

[0347] (First Embodiment)

[0348] First, the first embodiment is described.

[0349]FIG. 1 shows a configuration of a hard disk apparatus 2 that isone embodiment of a recording apparatus and a reproduction apparatus ofthe present invention.

[0350] The hard disk apparatus 2 is connected to IEEE1394 bus 1 and, inaddition, the IEEE1394 bus 1 is connected to a host system 3.

[0351] The IEEE1394 bus 1 is a high performance serial bus according tothe IEEE standard as described in the IEEE1394-1995 for relayingtransmissions of AV data or exchanges of commands.

[0352] A host system 3, which is provided with an I/F 16 that is anIEEE1394 interface, is an apparatus, for example an STB (set top box:satellite broadcast receiver) for moving data, for which copyrightprotection is necessary, in order to be recorded in a hard diskapparatus 2, to the IEEE1394 bus 1 and for receiving data, for whichcopyright protection is necessary, from the hard disk apparatus 2 viathe IEEE1394 bus 1 and for reproducing the data.

[0353] The hard disk apparatus 2 is an apparatus that can record AV datain a magnetic disk medium while protecting the copyright and/or canreproduce the AV data from the magnetic disk medium while exchanging AVdata with the host system 3 via the IEEE1394 bus 1.

[0354] That is to say, the hard disk apparatus 2 is an apparatus thatencrypts AV data, for which copyright protection is necessary such asencrypted content 17, records this on a magnetic disk medium 29, asshown in FIG. 2, and reproduces the encrypted content 17.

[0355] The hard disk apparatus 2 is formed of an I/F 4, a controller 10and a recording means 15.

[0356] In addition, the controller 10 is formed of an encryption means11, a decryption means 12, a device unique key 13 and a control means14.

[0357] The I/F 4 is an interface of the system of the IEEE1394-DTCP(digital transmission content protection) and is an interface thatexchanges commands and AV data with an external device, such as a hostsystem 3, via the IEEE1394 bus 1 and, in addition, that encrypts the AVdata, certifies the other device and nullifies the key for decryptingthe encryption according to whether or not the certification issuccessful so that the copyright of the AV data that is transmitted tothe IEEE1394 bus 1 can be protected.

[0358] The encryption means 11 that forms the controller 10 is a meansof encrypting AV data sent from the I/F 4 as well as data added to theAV data.

[0359] The decryption means 12 is a means of decrypting the AV data readout by the recording means 15 and the data that is added to the AV data.

[0360] The configurations of the encryption means 11 and of thedecryption means 12 are described below.

[0361] The device unique key 13 is a numeral and/or a symbol that isspecifically allocated to each of the hard disk apparatuses 2 and isrecorded in a region that cannot be accessed from the outside of thehard disk apparatus 2 and/or of the controller 10.

[0362] The recording means 15 is formed of a magnetic disk medium forrecording data, a magnetic head for recording and reproducinginformation on the magnetic disk medium, an actuator, on the tip ofwhich the magnetic head is mounted, that carries out an operation forpositioning of the magnetic head at an arbitrary radius position of themagnetic disk medium, a spindle motor for rotating the magnetic diskmedium, and the like, and is a means of writing data in the magneticdisk medium or of reading data out from the magnetic disk medium. Themagnetic disk medium, from which the recording means 15 reads out dataand to which the recording means 15 writes in data, is built in into thehard disk apparatus 2 and is not removable from the hard disk apparatus2.

[0363] The control means 14 is a means that designates an LBA and makesthe LBA correspond to the head or to the sector of the magnetic diskmedium of the recording means 15 and that positions the magnetic headbycontrolling the actuator and the spindle motor so that data is writteninto or read out from the magnetic disk medium by the magnetic head.

[0364] Now, as described above, FIG. 3 shows a configuration of theencryption means 11.

[0365] The encryption means 11 is formed of an encryptor 19, anencryptor 20, an encryptor 21 and an adder 22.

[0366] In addition, the device unique key 13 is a numeral and/or asymbol specific to the hard disk apparatus 2 allocated to the hard diskapparatus 2 as described above in FIG. 3. That is to say, a differentdevice unique key 13 is allocated to each of the hard disk apparatuses2. In addition, the device unique key 13 is stored in a secret region 18provided within the controller 10 of the hard disk apparatus 2. Thissecret region 18 is a region that is protected so that an externaldevice can neither write in nor read out information therefrom and onlythe controller 10 can read out information stored in the secret region18. Concretely, this secret region 18 can be implemented by using a ROMon a printed circuit board. That is to say, the device unique key 13 isrecorded in the ROM on the printed circuit board. Namely, this ROMcannot be accessed from the outside of the hard disk apparatus 2 and/orof the controller 10.

[0367] The title key 23 is a numeral and/or a symbol specificallyallocated to each piece of AV data.

[0368] CCI (copy control information) 24 is attached to the AV data andis a numeral of two bits representing copy permission information thatis sent by being attached to the sy region of the isochronous header ofthe isochronous packet.

[0369]FIG. 8 shows the values that can be taken by the CCI and themeanings thereof. When the CCI is 11 it means “Copy Never.” That is tosay, though the AV data to which the CCI of this value is attached canbe viewed, making copies of this AV data by recording the AV data on thehard disk apparatus 2, or the like, is prohibited.

[0370] When the CCI is 10 it means “Copy Once.” That is to say, the AVdata to which the CCI of this value is attached can be viewed and,furthermore, only the first generation copy of the AV data can be madeby recording the AV data on the hard disk apparatus 2, or the like.

[0371] When the CCI is 01 it means “No More Copy.” That is to say, theAV data copied from the AV data of which the CCI is “Copy Once” becomesof “No More Copy.” Namely, this means that the making of additionalcopies is prohibited. That is, “No More Copy” is necessary to prohibitfurther copying at the time of reproduction after the content of “CopyOnce” is recorded.

[0372] When the CCI is 00 it means “Copy Free.” That is to say, the AVdata to which this value of the CCI is attached can be freely viewedand, in addition, copies can be freely made.

[0373] A recording unit number 25 is a number and/or a symbol specificto the recording block that has the size of the recording unit that isthe minimum unit when the control means 14 sequentially accesses therecording means 15. That is to say, a different recording unit number 25is allocated to the above described different recording block. Such arecording unit number 25 is secret information that cannot be seen bythe user or by an external device. The recording unit number 25 and arecording unit are described below.

[0374] Here, the recording unit number 25 of the present embodiment isan example of the recording unit information of the present invention.

[0375] The content 26 is the AV data that forms a program, such as ofmovies, music or of a drama.

[0376] In addition, a magnetic disk medium 29 is a magnetic disk to orfrom which data is written or read by the recording means 15.

[0377] The encryptor 19 is a means that reads out the device unique key13, which is stored in the secret region 18 and that encrypts the titlekey 23, so as to output the encrypted title key 28.

[0378] The adder 22 is a means of generating information for generatinga key wherein the CCI 24 is added so as to follow the lowest bit of thetitle key 23.

[0379] Here, information for generating a key according to the presentembodiment is an example of the second information of the presentinvention.

[0380] The encryptor 20 is a means of generating a content key that isencrypted by using the recording unit number 25.

[0381] The encryptor 21 is a means of encrypting the content 26 by usingthe content key.

[0382] In addition, FIG. 4 shows the configuration of the decryptionmeans 12.

[0383] The decryption means 12 is formed of a decryptor 31, a decryptor32, a decryptor 33 and an adder 34.

[0384] In addition, FIG. 4 shows the device unique key 13, the title key35, the CCI 36, the recording unit number 25 and the decrypted content37, which, respectively, correspond to the device unique key 13, thetitle key 23, the CCI 24, the recording unit number 25 and the content26 shown in FIG. 3.

[0385] In addition, the magnetic disk medium 29 is a magnetic disk ofwhich the data is read out or written in by the recording means 15,which is the same as in FIG. 3.

[0386] The decryptor 31 is a means of reading out the device unique key13 that is stored in the secret region 18 and of decrypting theencrypted title key 28 by using the device unique key 13 so as to outputthe title key 35.

[0387] The adder 34 is a means of generating information for generatinga key to which the CCI 27 is added following the lowest bit of the titlekey 35.

[0388] The decryptor 32 is a means of generating a content key bydecrypting the information for generating a key by using the recordingunit number 25.

[0389] The decryptor 33 is a means of decrypting the encrypted content17 by using the content key so as to output the decrypted content 37.

[0390]FIG. 7(a) shows a recording format of the magnetic disk medium 29of the recording means 15. The region of the magnetic disk medium 29 isdivided into a plurality of recording units 39, which are recordingblocks of the size of the recording unit. The control means 14 cannotaccess regions that are smaller than the recording unit 39 and alwaysaccesses the recording block, such as 39, from the head. That is to say,the control means 14 always writes in or reads out data to or from eachrecording block of the recording unit 39.

[0391] In addition, in the present embodiment, one recording unit 39 isdivided into the regions of the header 38 and the data 40 for recordingAV data.

[0392] The data 40 is a region in which a transport packet is recorded.In addition, the encrypted title key 35 is recorded in the header 38.The information recorded in the region of the header 38 of the recordingunit 39 and the information recorded in the region of the data 40 is allencrypted.

[0393] Here, another example wherein AV data is recorded in therecording block of the recording medium is shown in FIG. 7(b). Therecording block 150 is recorded by being divided into the header 151 andthe data 152 in the same manner as of the recording format of thepresent embodiment. However, the header 151 portion is thenon-encryption 154 portion while the data 155 portion is the encryptionportion. That is to say, only the data 152 portion is encrypted.Accordingly, the key 153, which is encrypted and transferred at the timewhen the IEEE1394 bus 1, or the like, is transferred, is recorded in theheader 151 part without being encrypted. Accordingly, in the case thatan external device incorrectly access the header 151 portion, theexternal device can gain the key 153 and, therefore, the encryption ofthe AV data is decrypted and the copyright thereof cannot be protected.

[0394] Contrarily, since the recording format of the present embodimentencrypts the entirety data recorded in the recording unit 39 as shown inFIG. 7 (a), the copyright can be protected without fail in comparisonwith the recording format as shown in FIG. 7(b).

[0395] In such a manner, the recording format of the present embodimentis specific to the manufacturer that manufactures the hard diskapparatus. Therefore, it is difficult for external devices that adopt astandard format to read out data recorded in a format specific to such amanufacturer. Accordingly, by using the recording format of the presentembodiment, the copyright of the AV data recorded in the magnetic diskmedium 29 can be protected. In addition, the sector size or the size ofthe recording unit of the recording format of the present embodiment canbe freely designed.

[0396] As a concrete example of the recording unit, for example, asector of the magnetic disk medium 29 is cited. That is to say, apredetermined number of sequential sectors can be a recording unit 39such as one sector, sequential 62 sectors, sequential 128 sectors . .sequential 2048 sectors.

[0397] In addition, as a concrete example of the recording unit number25, for example, the LBA (logical block address) can be used as therecording unit number 25. That is to say, any of the LBA of the headsector of the recording unit 39, the LBA of the second sector from thehead of the recording unit 39 or the Nth (N is an integer of the totalnumber, or less, of sectors that form the recording unit) sector fromthe head of the recording unit 39 can be used as the recording unitnumber 25.

[0398] Or, a number for uniquely specifying the recording unit 39 can beutilized. That is to say, the number when the recording unit 39 iscounted in the order of shifting from the inner periphery to the outerperiphery of the magnetic disk medium 29 can be the recording unitnumber 25.

[0399] Or, an address for internal management used for managing therecording units can be utilized.

[0400] Or, a numeric value or a symbol produced by combining thisplurality of examples according to a predetermined rule may be used.

[0401] In summary, the recording unit number 25 may merely beinformation, without overlap, that cannot be seen by the user and thatcan uniquely specify the entirety of the recording unit 39 of themagnetic disk medium 29.

[0402] Here, the hard disk apparatus 2 of the present embodiment is anexample of a recording apparatus of the present invention, the hard diskapparatus 2 of the present embodiment is also an example of areproduction apparatus of the present invention and a recording means ofthe present embodiment is also an example of a reproduction means of thepresent invention.

[0403] Furthermore, the I/F 4 of the present embodiment is an example ofan interface of the present invention and a magnetic disk medium 29 ofthe present embodiment is an example of a disk of the present invention.

[0404] In addition, the controller 13, which includes the encryptionmeans 11, the decryption means 12 and the device unique key 13, and theI/F 4 are integrated and provided on one sheet of printed circuit board.In addition, the encryption means 11, the decryption means 12, thecontrol means 14 and the I/F 4 are, respectively, mounted as one chipLSIs. Signals in the terminals of these chips are scrambled by, forexample, rearranging of the bits, according to a format that is notdisclosed. Accordingly, even in the case that an external device takesout signals that can be reproduced as AV data from these terminals, itis not easy to reproduce AV data since the format that has generated thesignals is not known.

[0405] Next, the operation of the present embodiment formed in such amanner is described.

[0406] First, the operation of the case wherein the hard disk apparatus2 records AV data that requires copyright protection is described.

[0407] Here, according to the present embodiment, the AV data is sent inthe MPEG2 transport stream format.

[0408] The major operations of the host system 3 and of the hard diskapparatus 2 are shown in the form of a flow chart in FIG. 5(a). Inaddition, the associations of the operations of the host system 3 and ofthe hard disk apparatus 2 are shown by using a schematic diagram in FIG.5(b).

[0409] The host system 3 encrypts AV data, for which copyrightprotection is necessary, that is transmitted to the IEEE1394 bus 1 as anisochronous packet.

[0410] The I/F 16 encrypts AV data in MPEG2 transport stream format.Furthermore, a source packet is generated by adding a source packetheader to the transport packet of the encrypted MPEG2 transport stream.Then, a CIP is generated by adding a CIP header to a data block fromwhich, or to which, the source packet is divided, or combined. Moreover,an isochronous packet is generated by adding an isochronous header tothe CIP and is transmitted to the IEEE1394 bus 1.

[0411] In addition, at the time when the isochronous packet isgenerated, the CCI 24 in FIG. 3 is added to the sy region of theisochronous packet.

[0412] The host system 3 issues a command for the starting of therecording of AV data in the hard disk apparatus 2.

[0413] This command is sent from I/F 16 to I/F 4 through the IEEE1394bus 1 as an asynchronous packet.

[0414] When receiving the command that indicates the start of recording,the I/F 4 requires the certification from I/F 16.

[0415] Upon receiving this, the I/F 16 and the I/F 4 carry out acertification operation (S1). This certification operation isrepresented by certification 85 in FIG. 5(b)

[0416] The I/F 16 judges whether the hard disk apparatus 2 is a properdevice or an incorrect device for recording the AV data. In the case ofa proper device, the certification is successful, while in the case ofan incorrect device, the certification fails (S2).

[0417] In the case that the hard disk apparatus 2 is not qualified torecord AV data, the certification fails (S3). In this case, the harddisk apparatus 2 cannot record the AV data.

[0418] In the case that the hard disk apparatus 2 is a proper devicethat can record AV data, the certification succeeds.

[0419] When the certification is successful, the I/F 4 receives theisochronous packet transmitted by the host system 3 after identifyingthe isochronous channel of the isochronous packet.

[0420] Then, the I/F 4 separates the CCI from the isochronous header ofthe received isochronous packet.

[0421] Then, the following operations are carried out depending on thevalue of the CCI.

[0422] When the CCI is 11 in FIG. 8, that is to say in the case of “CopyNever,” the I/F 4 makes a notification that no recording processing isto be carried out to the host system 3 and does not instruct thecontroller 10 to start recording processing because it is not permittedto record the AV data.

[0423] When the CCI is 10, that is to say in the case of “Copy Once,”the I/F 4 makes a notification that recording processing is to bestarted to the host system 3 and, in addition, instructs the controller10 to start recording processing.

[0424] When the CCI is 01, that is to say in the case of “No More Copy,”the I/F 4 carries out the same operation as in the case that the CCI is“Copy Never.”

[0425] When the CCI is 00, that is to say in the case of “Copy Free,” anotification that recording processing to be started is made to the hostsystem 3 and, in addition, the controller 10 is instructed so as tostart recording processing.

[0426] Accordingly, in the case that the CCI is 10, the I/F 4 decodesthe encrypted AV data with the key received from the host system 3 atthe time of the certification operation. Then, the decoded AV data isoutputted for every transport packet according to the timing indicatedby the time stamp for transmission that is added to the source packetheader for every transport packet. In the case that the CCI is 00, sincethe AV data is sent without being encrypted, no decoding processing iscarried out and the AV data is outputted for every transport packetaccording to the timing indicated by the time stamp for transmission.

[0427] Though the AV data outputted from the I/F 4 is decrypted in sucha manner and becomes of the form of plain sentences, the AV data isoutputted by the signal inscribed in a format unique to the hard diskapparatus 2 and, therefore, even in the case that a third party takesout the signal from a terminal of the chip of the I/F 4, it is verydifficult to recover the AV data in a form that is useable by the thirdparty.

[0428] The MPEG2 transport packet sent from the I/F 4 is inputted to theencryption means 11.

[0429] First, the encryptor 19 reads out the device unique key 13 storedin the secret region 18 (S4).

[0430] The encryption means 11 detects the title key 23 attached to theAV data sent from the I/F 4. Then, the encryptor 19 encrypts thedetected title key 23 by means of the device unique key 13 (S5).

[0431] Next, the title key 23 encrypted by the encryptor 19 is recorded,as the title key 28 encrypted, in the magnetic disk medium 29 of therecording means 15 in accordance with the control of the control means14 (S6). This encrypted title key 28 is shown in FIG. 5(b).

[0432] Furthermore, the encryption means 11 detects the CCI 24 that issent attached to the AV data. The detected CCI 24 is recorded, as theCCI 27, in the magnetic disk medium 29 of the recording means 15 inaccordance with the control of the control means 14.

[0433] The adder 22 generates information for key generation that isinformation to which the CCI 24 is attached so as to follow the lowestbit of the title key 23.

[0434] On the other hand, information related to which recording unit isto record the AV data is also sent from the control means 14 asadditional information to the AV data. The encryption means 11 requiresthe recording unit number 25 of the recording unit that is to record theAV data.

[0435] The encryptor 20 encrypts the information for generating the keygenerated by the adder by using the recording unit number 25 of therecording unit that is to record the AV data. This encrypted informationis referred to as a content key. The content key is encrypted accordingto the recording unit number 25 and varies for each recording unit.

[0436] Next, the encryptor 21 encrypts the content 26, which is the AVdata to be recorded thenceforth using the content key (S7).

[0437] The encrypted AV data is recorded, as the encrypted content 17,in a recording unit of the magnetic disk medium 29, wherein the data isto be recorded, of the recording means 15, according to the control ofthe control means 14 (S8). FIG. 5(b) also shows the encrypted content17.

[0438] In the following, the operation is repeated in the same mannerwherein information for key generation is encrypted by the recordingunit number 25 for every recording unit so as to generate a content keyand the generated content key encrypts the content 26 (S7) so that theencrypted content 17 is recorded in the magnetic disk medium 29 (S8).

[0439] The hard disk medium 29 records AV data for which copyrightprotection is necessary in the magnetic disk medium 29 in the abovemanner.

[0440] Next, the operation of the case wherein the hard disk apparatus 2reproduces AV data for which copyright protection is necessary isdescribed.

[0441]FIG. 6(a) shows a flow chart of the main operation of the hostsystem 3 and of the hard disk apparatus 2 at the time of reproduction.In the following, the description is given according to this flow chart.In addition, FIG. 6(b) shows a schematic diagram wherein theassociations of the main operations of the host system 3 and the harddisk apparatus 2 at the time of reproduction are described.

[0442] The host system 3 issues a command that instructs the hard diskapparatus 2 to start reproduction.

[0443] This command is sent from the I/F 16 to the I/F 4 through theIEEE1394 bus 1 as an asynchronous packet.

[0444] Furthermore, the I/F 16 requires certification from the I/F 4.

[0445] By receiving this, the I/F 16 and the I/F 4 carry out thecertification operation (S9). This certification operation is shown asthe certification 86 in FIG. 6(b).

[0446] The I/F 4 judges whether the host system 3 is a proper device oris an incorrect device for utilizing the AV data. In the case of aproper device, certification is successful while in the case that of anincorrect device, certification fails (S10).

[0447] In the case that the host system 3 is not qualified to use the AVdata, certification fails (S11). In this case, the host system 3 cannotrecord the AV data.

[0448] In the case that the host system 3 is a proper device that canrecord the AV data, certification is successful.

[0449] When the certification is successful, the I/F 4 makes anotification to the controller 10 that a command for reproducing the AVdata has been sent.

[0450] When the decryption means 12 receives this notification, thedecryptor 31 first reads in the device unique key 13 stored in thesecret region 18 (S12).

[0451] Furthermore, the recording means 15 reads out the encrypted titlekey 28 from the magnetic disk medium 29 according to the control of thecontrol means 14 (S13). FIG. 6(b) also shows the encrypted title key 28.

[0452] The decryptor 31 decrypts the encrypted title key 28 with thedevice unique key 13 (S14). Then, the decryption means 12 transfers thedecrypted title key 35 to the I/F 4.

[0453] The recording means 15 reads out the CCI 27 from the magneticdisk medium 29 according to the control of the control means 14.

[0454] The decryption means 12 transfers the CCI 27 to the I/F 4.

[0455] The adder 34 generates key generation information, which isinformation gained by attaching the CCI 27 sequentially read out to thelowest bit of the decrypted title key 35.

[0456] The control means 14 designates the recording unit 39 that is tobe read out and controls the recording means 15 so as to read out theencrypted content 17, which is information stored in the recording unit39.

[0457] The decryption means 12 finds out the recording unit number 25 ofthe recording unit 39.

[0458] The decryptor 32 decrypts the key generation informationgenerated by the adder by using the recording unit number 25 of therecording unit 39 that is ready to read out data. This decryptedinformation referred to as a content key. The content key is decryptedby the recording unit number 25 and, therefore, it varies for eachrecording unit.

[0459] Next, the recording means 15 reads out the encrypted content 17,which is information stored in the recording unit, from which the datais to be read out, of the magnetic disk medium 29, according to thecontrol of the control means 14 (S15). FIG. 6(b) also shows theencrypted content 17.

[0460] Next, the decryptor 33 decrypts the encrypted content 17 read outby the recording means 15 with the content key (S16).

[0461] The decryption means 12 transfers the decrypted content 37 to theI/F 4.

[0462] In the following, the operation is repeated in the same manner asabove wherein information for key generation is decrypted with therecording unit number 25 for each recording unit so as to generate acontent key and the encrypted content 17 is read out (S15) and theencrypted content 17 is decrypted with the content key (S16) so that thedecrypted content 27 is transferred to the I/F 4 as an MPEG2 transportstream.

[0463] In addition, though the AV data outputted from the decryptionmeans 12 is decrypted, it is a signal inscribed in a format unique tothe hard disk apparatus 2 and, therefore, even a third party takes outthe signal from a terminal of the chip of the decryption means 12, it isvery difficult to recover the AV data in a form that is useable by thethird party.

[0464] The I/F 4 encrypts the AV data sent from the controller 10. Then,the I/F 4 transfers the AV data to the IEEE1394 bus 1 as an isochronouspacket.

[0465] The I/F 16 of the host system 3 identifies the isochronouschannel and receives the isochronous packet so as to decode theencrypted AV data.

[0466] The I/F 16 outputs the received AV data as an MPEG2 transportstream.

[0467] The outputted AV data is separated by the transport streamdecoder, which is not shown, and contained by the host system 3. Then,the AV decoder, which is not shown, carries out the AV decoding so as toconvert the AV data into an analog signal that is displayed on amonitor.

[0468] The hard disk medium 29 reproduces the AV data for whichcopyright protection is necessary from the magnetic disk medium 29 inthe above manner.

[0469] The hard disk apparatus 2 of the present embodiment can protectthe copyright of the AV data, for which copyright protection isnecessary, in any case wherein AV data is being recorded, wherein the AVdata is being reproduced and wherein the AV data has already beenrecorded in the recording means 15.

[0470] Here, though the magnetic disk 29 is described to be unremovablefrom the hard disk apparatus 2 in the present embodiment, the inventionis not limited to this but, rather, the magnetic disk may be removable.

[0471] Furthermore, though the device unique key 13 is described asbeing stored in a ROM as the secret region 18 on the printed circuitboard of the hard disk apparatus 2 in the present embodiment, theinvention is not limited to this. The secret region 18 may be providedin the magnetic disk medium 29. That is to say, the device unique key 13may be stored in a region of the magnetic disk 29 which the user cannotaccess.

[0472] Furthermore, though the encrypted title key 28 is described asbeing recorded in the user region, which the user can access, in themagnetic disk 29 in the present embodiment, the invention is not limitedto this. It may be recorded in a system region that the user cannotaccess in the disk medium 29. In addition, it may be recorded in a RAMprovided on a printed circuit board of the hard disk apparatus 2.

[0473] Furthermore, though the recording apparatus and the reproductionapparatus of the present invention are described as being integratedwith the hard disk apparatus 2 in the present embodiment, the inventionis not limited to this. The recording apparatus of the present inventionmay be formed of the I/F 4, the encryption means 11, the control means14 and the recording means 15 and is an apparatus that records AV datawhile the reproduction apparatus of the present invention may be formedof the I/F 4, the decryption means 12, the control means 14 and therecording means 15 and so on, in summary, the recording apparatus of thepresent invention may be provided with only an encryption means, acontrol means and a recording means. In addition, the reproductionapparatus of the present invention may be provided with only adecryption means and a control means.

[0474] Furthermore, though the I/F 4, the encryption means 11, thedecryption means 12 and the control means 14 of the hard disk apparatus2 are described as being formed, respectively, of one chip LSIs, theinvention is not limited to this. The I/F 4, the encryption means 11,the decryption means 12 and the control means 14 may be formed,respectively, of a plurality of LSI chips. In addition, the AV data isdescribed as being inscribed in an undisclosed format at a terminal of achip, the invention is not limited to this but, rather, it may beencrypted so as to be transferred between terminals. In addition, theproperties of the terminals of the chips may be defined in anundisclosed format. Here, the properties of the terminals of the chipsrepresents properties such as which terminal outputs what kind ofsignals, which terminals are combined to output what kind of signals orwhich respective terminals are used for what kinds of applications.Since such properties of the terminals of the chips are defined in anundisclosed format, the user cannot know, for example, which respectiveterminals are used for what kinds of applications. In summary, a signalthat is detected at a terminal that outputs a signal that can bereproduced as AV data by a third party from among the terminals of theprinted circuit board and the terminals of the chips where the I/F 4 andthe controller 10 are provided may be entirely encrypted and/ordescribed in an undisclosed format or the properties of these terminalsmay merely be defined in an undisclosed.

[0475] Furthermore, the I/F 4, the encryption means 11, the decryptionmeans 12 and the control means 14 of the hard disk apparatus 2 of thepresent embodiment may be formed of one LSI chip. In such a manner, thecopyright of the AV data can, without fail, be made even more secure.

[0476] Furthermore, though the AV data is described in the presentembodiment as being encrypted using the CCI, the invention is notlimited to this. The AV data may be encrypted without using the CCI.That is to say, instead of that, the adder 22 forms in formation for thekey generation of the CCI and of the title key 23, the title key 23 maybe directly used as the information for key generation without using theadder 22 so that the content key may be generated by encrypting thisinformation for the key generation with the recording unit number. Here,the title key 23 of this case is an example of the third information ofthe present invention. In the case that the AV data is encrypted withoutusing the CCI in such a manner, the CCI may be recorded in the magneticdisk medium 29 as in the present embodiment or the CCI may not berecorded in the magnetic disk medium 29.

[0477] Furthermore, though the hard disk apparatus 2 in the presentembodiment is described as follows: in the case that the value of theCCI that is attached to the AV data is “Copy Never,” the AV data is notrecorded; in the case that the value of the CCI is “Copy Once,” the AVdata is encrypted and is recorded; in the case that the value of the CCIis “No More Copy,” the AV data is not recorded; and in the case that thevalue of the CCI is “Copy Free,” the AV data is encrypted and isrecorded, the invention is not limited to this. In any case wherein avalue is taken by the CCI that is attached to the AV data, the AV datamay be encrypted and recorded. Or, in the case that the value of the CCIattached to the AV data is “Copy Free,” the AV data may be recorded asplain sentences without being encrypted.

[0478] Furthermore, though in the present embodiment the information forkey generation is described as being information to which the read outCCI is attached so as to follow the lowest bit of the decrypted titlekey, the invention is not limited to this. The information for the keygeneration may be information to which the read out CCI is attachedbefore the highest bit of the title key. Furthermore, the informationfor key generation may be information that includes only the title keyand the CCI or may include the title key and the CCI and, furthermore,may include other information in addition to the above. In addition, itmay be information that includes either the title key or the CCI. Insummary, the information for key generation of the present embodimentmay be only information that includes, at least, either the title key orthe CCI.

[0479] (Second Embodiment)

[0480] Next, the second embodiment is described.

[0481] In the present embodiment, the process of CCI is mainlydescribed.

[0482]FIG. 1 shows a configuration of a hard disk apparatus 2 that isone embodiment of a recording apparatus and a reproduction apparatus ofthe present invention.

[0483] The configuration of the hard disk apparatus 2 of the presentembodiment is the same as in the first embodiment.

[0484]FIG. 9 shows a format 41 of a magnetic disk medium 29 of arecording means 15. The left side on the paper corresponds to the innerperiphery 45 of the disk of the magnetic disk medium 29 while the rightside on the paper corresponds to the outer periphery 46 of the disk. Theregion of the inner periphery 45 side of the disk is system FAT 42 whilethe outer periphery 46 side of the disk is data 43.

[0485] The system FAT 42 is a system region that the user cannot accessand is a region such as for file management information where thecontrol means 14 utilizes in order to control the system.

[0486] On the other hand, the data 43 is a region that the user canaccess and AV data is recorded. That is to say, as shown in FIGS. 3 and4, the encrypted content 17, the encrypted title key 28, and the like,are recorded.

[0487] Then, the CCI is recorded in each recording unit that forms data43 in the system FAT 42 as shown in the CCI data 44. That is to say, thevalue of the CCI is allocated for each recording unit.

[0488] In addition, the file management information includes a FAT (fileallocation table) and information that is referred to as directory.

[0489] The FAT is a table wherein the address of a recording unit andthe address of the next recording unit make a pair and indicates inwhich recording unit and in which order the data of a file is stored.

[0490] In addition, the directory is a table that manages a file in ahierarchical manner and is a table wherein the address of the headrecording unit in which a file name and the data stored in the file arestored as well as information indicating the properties such as whetherthe file is exclusively for reading in or whether the over writing ispossible make a pair.

[0491] Processing such as file formation, editing, erasing, and thelike, can be managed by using the FAT and the directory.

[0492] Next, the operation of the present embodiment in such aconfiguration is described.

[0493] AV data is recorded in the hard disk apparatus 2 in the samemanner as in the first embodiment. At this time, the AV data is recordedin each recording unit one after another in the same manner as in thefirst embodiment. Whenever the recording of the AV data in a newrecording unit is completed, the control means 14 produces or updatesthe file management information that indicates in which recording unitthe AV data is recorded. Then, this file management information isstored in its own memory.

[0494] Then, when the recording of the AV data is all completed, thecontrol means 14 writes the produced or updated file managementinformation into the system FAT 42 so as to update the system FAT 42.

[0495] Finally, the control means 14 writes the value of the CCI of therecording unit, into which the AV data is newly written, into the filemanagement information.

[0496] Thus the AV data is first recorded in the magnetic disk medium 29at the time when the AV data is recorded, and after the recording of theAV data is completed the management information is recorded in themagnetic disk medium 29 and finally the CCI is written into the systemFAT 42.

[0497] In addition, it is assumed that the user turns off the power ofthe hard disk apparatus 2 by mistakenly pulling out the power plug ofthe hard disk apparatus 2 while the AV data is being recorded. In such acase, the portions of the file management information and the CCI thathave already being recorded in the AV data that is already in recordingcondition are erased.

[0498] The hard disk apparatus 2 of the present embodiment reproducesthe AV data, of which the recording is interrupted in such a manner, asfollows.

[0499] The control means 14 determines the order in which emptyrecording units of the magnetic disk 29 is used for writing according topredetermined rules.

[0500] The control means 14 reproduces the AV data, of which therecording has been interrupted, from the file management informationbefore updating by assuming that the AV data is recorded according tothe above rules. Then, the encryption means 11 attempts decrypting byusing a combination of the values for 2 bits of the CCI.

[0501] Then, furthermore, the AV data is decrypted from the beginning byusing the values of the CCI of which the decrypting is successful.

[0502] The hard disk apparatus 2 of the present embodiment can normallydecrypt the AV data, of which the recording is interrupted, in the abovemanner.

[0503] Furthermore, the end of the AV data is detected from thecontinuity of the value of PCR that is attached to the transport packet.

[0504] That is to say, the PCR is attached to the transport packet atintervals of 100 ms at the longest and the value of PCR is a countervalue of the upper 33 bits and the lower 9 bits which counts up at thefrequency of 27 MHz. Accordingly, when the value of PCR changes to thevalue corresponding to 100 ms, or more, it is understood that anotherpiece of AV data is reproduced by exceeding the terminal of the AV data.Accordingly, the encryption means 11 transfers the AV data only in therange, where the value of PCR is continuous, to the I/F 4.

[0505] Here, though the hard disk apparatus 2 of the present embodimentis described as encrypting and decrypting in the same manner as in thefirst embodiment, the invention is not limited to this. Encryptiondiffering from that in the first embodiment may be carried out. Insummary, any hard disk apparatus may be used as long as it carries outencryption by using the CCI.

[0506] Moreover, though the hard disk apparatus. 2 of the presentembodiment is described as attempting decrypting by assuming the valueof CCI, the invention is not limited to this. The CCI may be recorded inthe magnetic disk 29 before the AV data is recorded so that the CCI isalways recorded in the recording means 15 even when the recording of theAV data is interrupted.

[0507] Furthermore, though the recording apparatus and the reproductionapparatus of the present invention are described as being integrated inthe hard disk apparatus 2 according to the present embodiment, theinvention is not limited to this. The recording apparatus of the presentinvention may be formed of the I/F 4, the encryption means 11, thecontrol means 14 and the recording means 15 and may be an apparatus forrecording AV data while the reproduction apparatus of the presentinvention may be formed of the I/F 4, the decryption means 12, thecontrol means 14 and the recording means 15 and, in other words, therecording apparatus of the present invention may only be provided withan encryption means, a control means and a recording means. In addition,the reproduction apparatus of the present invention may only be providedwith a decryption means and a control means.

[0508] Furthermore, though the present embodiment is described such thatthe file management information includes FAT and the directory, theinvention is not limited to this. File management information such asthe HPFS (high performance file system) in OS/2, the file system of MacOS, the i node in UNIX, the VFAT (virtual FAT) in Windows 95, the NTFS(new technology file system) of Windows NT, or the like, maybe used.Here, in this case, it is necessary for the recording unit described inthe first embodiment to be agreed with the recording block of thesetypes of file management information. In summary, file managementinformation in the OS that allows recording in and reproduction from ahard disk may be used.

[0509] (Third Embodiment)

[0510] Next, the third embodiment is described.

[0511]FIG. 10 shows a configuration of a hard disk apparatus 47 that isone embodiment of a recording apparatus and a reproduction apparatus ofthe present invention.

[0512] The hard disk apparatus 47 of the present embodiment is providedwith an I/F 48 in place of the I/F 4 of the first embodiment. Inaddition, a controller 51 of the present embodiment does not have theencryption means 11, the decryption means 12 and the device unique key13.

[0513] The I/F 48 is an interface, which does not decrypt the encryptedAV data sent from the IEEE 1394 bus 1 and transfers it to the controller51, and which transfers the encrypted AV data sent from the controller51 to the IEEE 1394 bus 1 without change. Other parts are the same as ofthe I/F 4 of the first embodiment.

[0514] Next, the operation of the hard disk apparatus 47 of the presentembodiment in the above configuration is described primarily inreference to the points differing from the operation in the firstembodiment.

[0515] First, the operation at the time of recording AV data isdescribed.

[0516] The I/F 16 and the I/F 48 carries out a certification operationin the same manner as in the first embodiment and, then, thecertification is assumed to be successful. Then, the I/F 48 identifiesan isochronous channel and receives an isochronous packet sent from thehost system 3.

[0517] Then, an MPEG 2 transport stream is reconstructed from theisochronous packet. Then, the transport packet is sequentiallytransferred to the controller 51.

[0518] The control means 14 controls the recording means 15 to recordthe encrypted AV data in the magnetic disk 29.

[0519] Other parts are the same as in the first embodiment.

[0520] The hard disk apparatus 47 of the present embodiment recodes theencrypted AV data without change in the above manner.

[0521] Next, the operation at the time when the encrypted AV data isreproduced is described.

[0522] The I/F 16 and the I/F 48 carries out the certification operationin the same manner as in the first embodiment and, then, thecertification is assumed to be successful. Then, the control means 14controls the recording means 15 to read out the encrypted AV data and,then, the controller 51 transfers the read out AV data to the I/F 48 asthe MPEG 2 transport stream.

[0523] The I/F 48 transfers the encrypted MPEG 2 transport stream to theIEEE 1394 bus 1 as an isochronous packet.

[0524] All other parts are the same as in the first embodiment.

[0525] The hard disk-apparatus 47, having a simple configuration, canprotect the copy right of AV data by recording or reproducing the AVdata, which is encrypted for transmission, without change.

[0526] (Fourth Embodiment)

[0527] Next, the fourth embodiment is described.

[0528]FIG. 1 shows a hard disk apparatus 2 that is one embodiment of arecording apparatus and a reproduction apparatus of the presentinvention. The hard disk apparatus 2 of the present embodiment hasanother encryption means and another decryption means in place of theencryption means 11 and the decryption means 12 of the hard diskapparatus 2 described in the first embodiment.

[0529]FIG. 11 shows an encryption means 60 of the hard disk apparatus 2of the present embodiment. In addition, FIG. 12 shows a decryption means61 of the present embodiment.

[0530] The present embodiment is described primarily in reference to theencryption means 60 and the decryption means 61 that differ from thosein the first embodiment.

[0531] In FIG. 11, the encryption means 60 is formed of an encryptor 19,an encryptor 52 and an encryptor 21. That is to say, the encryptionmeans 60 differs from the encryption means 11 of the first embodimentand does not use the CCI for encryption.

[0532] That is to say, the encryptor 19 is a means of reading in thedevice unique key 13 that is stored in the secret region 18 and ofencrypting the title key 23 so that the encrypted title key 28 isoutputted.

[0533] Here, the title key 23 of the present embodiment is an example ofthe first information of the present invention.

[0534] The encryptor 52 is a means of generating a content key that isgained by encrypting the title key 23 by using the recording unit number25.

[0535] The encryptor 21 is a means of encrypting the content 26 by usinga content key.

[0536]FIG. 12 shows a decryption means 61 of the hard disk apparatus 2of the present embodiment.

[0537] In FIG. 12, the decryption means 61 is formed of a decryptor 31,a decryptor 53 and a decryptor 33. The decryption means 61 differs fromthat of the first embodiment and does not use the CCI for decrypting.

[0538] That is to say, the decryptor 31 is a means of reading in thedevice unique key 13 that is stored in the secret region 18 and ofdecrypting the encrypted title key 28 by using the device unique key 13so that the title key 35 is outputted.

[0539] Here, the title key 28 of the present embodiment is an example ofthe second information of the present invention.

[0540] The decryptor 53 is a means of decrypting the title key 35 byusing the recording unit number 25 so as to generate a content key.

[0541] The decryptor 33 is a means of decrypting the encrypted contents17 by using a content key so as to output the decrypted content 37.

[0542] Next, the operation of the present embodiment in such aconfiguration is described primarily in reference to the operations ofthe encryption means 60 and the decryption means 61 that differ fromthose of the first embodiment.

[0543] First, the operation of the encryption means 60 is described.

[0544] The encryptor 19 reads in the device unique key 13 stored in thesecret region 18.

[0545] The encryption means 60 detects the title key 23 that is added tothe AV data sent from the I/F 4. Then, the encryptor 19 encrypts thedetected title key 23 by means of the device unique key 13.

[0546] Next, the title key 23 encrypted by the encryptor 19 is recordedaccording to the control of the control means 14 in the same manner asof the encrypted title key 28 in the magnetic disk medium 29 of therecording means 15.

[0547] Furthermore, the encryption means 60 detects the CCI 24 that issent by being added to the AV data. The detected CCI 24 is recorded inthe magnetic disk medium 29 of the recording means 15 as the CCI 27according to the control of the control means 14.

[0548] The encryption means 60 finds the recording unit number 25 of therecording unit in which the CCI is recorded.

[0549] The encryptor 52 encrypts the title key 23 by using the recordingunit number 25 of the recording unit in which the AV data is to berecorded. This encrypted information is referred to as content key. Thecontent key is encrypted by using the recording unit number 25 andvaries for each recording unit.

[0550] Next, the encryptor 21 encrypts the content 26 that is the AVdata to be recorded by using the content key.

[0551] The encrypted AV data is recorded, as the encrypted contents 17,in the recording unit, wherein it is to be recorded, of the magneticdisk medium 29 of the recording means 15 according to the control of thecontrol means 14.

[0552] In the following the operation is repeated wherein the title key23 is encrypted by using the recording unit number 25 for each recordingunit so as to generate a content key in the same manner as the above andthe generated content key is used to encrypt the content 26 so that theencrypted content 17 is recorded in the magnetic disk medium 29.

[0553] Thus the hard disk medium 29 records the AV data, of which thecopyright protection is necessary, in the magnetic disk medium 29.

[0554] Next, the operation of the decryption means 61 is described.

[0555] The decryptor 31 reads in the device unique key 13 stored in thesecret region 18.

[0556] Furthermore, the recording means 15 reads out the encrypted titlekey 28 from the magnetic disk medium 29 according to the control of thecontrol means 14.

[0557] The decryptor 31 decrypts the encrypted title key 28 by means ofthe device unique key 13. Then, the decryption means 61 transfers thedecrypted title key 35 to the I/F 4.

[0558] The recording means 15 reads out the CCI 27 from the magneticdisk medium 29 according to the control of the control means 14.

[0559] The decryption means 12 transfers the CCI 27 to the I/F 4.

[0560] The control means 14 designates the recording unit 39 from whichthe encrypted content 17 is to be read out and controls the recordingmeans 15 to read out the content 17 that is the information stored inthe recording unit 39.

[0561] The decryption means 61 finds the recording unit number 25 of therecording unit 39.

[0562] The decryptor 53 decrypts the title key 35 by using the recordingunit number 25 of the recording unit 39 from which data is to be readout. This decrypted information is referred to as content key. Since thecontent key is decrypted by using the recording unit number 25, itvaries for each recording unit.

[0563] Next, the recording means 15 reads out the encrypted content 17that is the information stored in the recording unit, from which theinformation is to be read out, of the magnetic disk medium 29 accordingto the control of the control means 14.

[0564] Next, the decryptor 33 decrypts the encrypted content 17 read outby the recording means 15 by using the content key.

[0565] The decryption means 61 transfers the decrypted content 37 to theI/F 4.

[0566] In the following, the operation is repeated in the same manner,wherein the title key 35 is decrypted for each recording unit by usingthe recording unit number 25 so as to generate a content key, whereinthe encrypted content 17 is read out and wherein the encrypted content17 is decrypted by using the content key so. that the decrypted content27 is transferred to the I/F 4 as an MPEG 2 transport stream.

[0567] The same effects as in the first embodiment can be gained byusing the encryption means 60 and the decryption means 61, which aredescribed in the present embodiment, in the hard disk apparatus 2.

[0568] In addition, the encryption means 60 and the decryption means 61can of course be applied to a variety of modifications described in thefirst embodiment.

[0569] (Fifth Embodiment)

[0570] Next, the fifth embodiment is described.

[0571]FIG. 1 shows a hard disk apparatus 2 that is one embodiment of arecording apparatus and a reproduction apparatus of the presentinvention. The hard disk apparatus 2 of the present embodiment hasanother encryption means and another decryption means in place of theencryption means 11 and the decryption means 12 of the hard diskapparatus 2 described in the first embodiment.

[0572]FIG. 13 shows an encryption means 62 of the hard disk apparatus 2of the present embodiment. In addition, FIG. 14 shows a decryption means63 of the present embodiment.

[0573] The present embodiment is described primarily in reference to theencryption means 62 and the decryption means 63 that differ from thoseof the first embodiment.

[0574] In FIG. 13, the encryption means 62 are formed of an adder 54, anencryptor 55 and an encryptor 21. The encryption means 62 of the presentembodiment differs from the encryption means 11 and does not use a titlekey for the encryption of the AV data.

[0575] That is to say, the adder 54 is a means of generating informationfor key generation to which the CCI 24 is added so as to follow thelower bit of the device unique key 13.

[0576] Here, the information for key generation of the presentembodiment is an example of the first information of the presentinvention.

[0577] The encryptor 55 is a means of generating a content key that isgained by encrypting the information for key generation using therecording unit number 25.

[0578] The encryptor 21 is a means of encrypting the content 26 by usinga content key.

[0579]FIG. 14 shows a decryption means 63 of the hard disk apparatus 2of the present embodiment.

[0580] In FIG. 14, the decryption means 13 is formed of an adder 56, adecryptor 57 and a decryptor 33.

[0581] The adder 56 is a means of reading in the device unique key 13stored in the secret region 18 and of generating information for keygeneration to which the CCI 36 is added so as to follow the lower bit ofthe device unique key 13.

[0582] The decryptor 57 is a means of decrypting the information for keygeneration by using the recording unit number 25 so as to generate acontent key.

[0583] The decryptor 33 is a means of decrypting the encrypted content17 by using a content key so as to output the decrypted content 37.

[0584] Next, the operation of the present embodiment in such aconfiguration is described primarily in reference to the operations ofthe encryption means 62 and the decryption means 63 that differ from thefirst embodiment.

[0585] First, the operation of the encryption means 62 is described.

[0586] The adder 54 reads in the device unique key 13 stored in thesecret region 18. Then, information for key generation to which the CCI24 is added so as to follow the lower bit of the device unique key 13 isgenerated.

[0587] Furthermore, the encryption means 62 detects the CCI 24 that issent by being attached to the AV data. The detected CCI 24 is recorded,as the CCI 27, in the magnetic disk medium 29 of the recording means 15according to the control of the control means 14.

[0588] Then, the adder 54 generates information for key generation towhich the CCI 24 is added so as to follow the lower bit of the deviceunique key 13.

[0589] The encryption means 62 finds the recording unit number 25 of therecording unit in which data is to be recorded.

[0590] The encryptor 55 encrypts the information for key generation byusing the recording unit number 25 of the recording unit in which the AVdata is to be recorded. This encrypted information is referred to as acontent key. Since the content key is encrypted by using the recordingunit number 25, it varies for each recording unit.

[0591] Next, the encryptor 21 encrypts the content 26 that is the AVdata to be recorded by using the content key.

[0592] The encrypted AV data is recorded, as the encrypted content 17,in the recording unit, wherein the data is to be recorded, of themagnetic disk medium 29 of the recording means 15 according to thecontrol of the control means 14.

[0593] In the following, the operation is repeated in the same mannerwherein the information for key generation is encrypted for eachrecording unit by using the recording unit number 25 so as to generate acontent key and the generated content key is used to encrypt the content26 so that the encrypted content 17 is recorded in the magnetic diskmedium 29.

[0594] Thus the hard disk medium 29 records the AV data, of which thecopyright protection is necessary, in the magnetic disk medium 29.

[0595] Next, the operation of the decryption means 63 is described.

[0596] The adder 56 reads in the device unique key 13 stored in thesecret region 18.

[0597] The recording means 15 reads out the CCI 27 from the magneticdisk medium 29 according to the control of the control means 14.

[0598] The decryption means 63 transfers the CCI 27 to the I/F 4.

[0599] The adder 56 generates information for key generation to whichthe CCI 27 is added so as to follow the lower bit of the device uniquekey 13.

[0600] The control means 14 designates the recording unit 39 from whichthe encrypted content 17 is to be read out and controls the recordingmeans 15 to read out the content 17 that is the information stored inthe recording unit 39.

[0601] The decryption means 63 finds the recording unit number 25 of therecording unit 39.

[0602] The decryptor 57 decrypts the information for key generation byusing the recording unit number 25 of the recording unit 39 from whichdata is to be read out. This decrypted information is referred to ascontent key. Since the content key is decrypted by the recording unitnumber 25, it varies for each recording unit.

[0603] Next, the recording means 15 reads out the encrypted content 17that is the information stored in the recording unit, from which theinformation is to be read out, of the magnetic disk medium 29 accordingto the control of the control means 14.

[0604] Next, the decryptor 33 decrypts the encrypted content 17 read outby the recording means 15 using the content key.

[0605] The decryption means 63 transfers the decrypted content 37 to theI/F 4.

[0606] In the following, the operation is repeated in the same mannerwherein the information for key generation is decrypted for eachrecording unit by using the recording unit number 25 so as to generate acontent key, wherein the encrypted content 17 is read out so that theencrypted content 17 is decrypted by using the content key and whereinthe decrypted content 27 is transferred to the I/F 4 as an MPEG 2transport stream.

[0607] The same effects as in the first embodiment can be gained byusing the encryption means 62 and the decryption means 63, which aredescribed in the present embodiment, in the hard disk apparatus 2.

[0608] In addition, the encryption means 62 and the decryption means 63can of course be applied to a variety of modifications described in thefirst embodiment.

[0609] (Sixth Embodiment)

[0610] Next, the sixth embodiment is described.

[0611]FIG. 1 shows a hard disk apparatus 2 that is one embodiment of arecording apparatus and a reproduction apparatus of the presentinvention. The hard disk apparatus 2 of the present embodiment hasanother encryption means and another decryption means in place of theencryption means 11 and the decryption means 12 of the hard diskapparatus 2 described in the first embodiment.

[0612]FIG. 15 shows an encryption means 64 of the hard disk apparatus 2of the present embodiment. In addition, FIG. 16 shows a decryption means65 of the present embodiment.

[0613] The present embodiment is described primarily in reference to theencryption means 64 and the decryption means 65 that differ from thoseof the first embodiment.

[0614] In FIG. 15, the encryption means 64 is formed of an encryptor 58and an encryptor 21. The encryption means 64 of the present embodimentdiffers from the encryption means 11 and does not use the title key andthe CCI for the encryption of the AV data.

[0615] That is to say, the encryptor 58 is a means of generating acontent key that is gained by encrypting the device unique key 13 usingthe recording unit number 25.

[0616] Here, the device unique key 13 of the present embodiment is anexample of the first information of the present invention.

[0617] The encryptor 21 is a means of encrypting the content 26 by usinga content key.

[0618]FIG. 16 shows the decryption means 65 of the hard disk apparatus 2of the present embodiment.

[0619] In FIG. 16, the decryption means 65 is formed of a decryptor 59and a decryptor 33.

[0620] The decryptor 59 is a means of decrypting the device unique key13 by using the recording unit number 25 so as to generate a contentkey.

[0621] The decryptor 33 is a means of decrypting the encrypted content17 by using the content key so as to output the decrypted content 37.

[0622] Next, the operation of the present embodiment in such aconfiguration is described primarily in reference to the operations ofthe encryption means 64 and the decryption means 65 that differ fromthose of the first embodiment.

[0623] First, the operation of the encryption mean 64 is described.

[0624] The encryption means 64 detects the CCI 24 that is sent by beingadded to the AV data. The detected CCI 24 is recorded, as the CCI 27, inthe magnetic disk medium 29 of the recording means 15 according to thecontrol of the control means 14.

[0625] The encryptor 58 reads out the device unique key 13 from thesecret region 18.

[0626] The encryption means 64 finds the recording unit number 25 of therecording unit in which the CCI is to be recorded.

[0627] The encryptor 58 encrypts the disk unique key 13 by using therecording unit number 25 of the recording unit in which the AV data isto be recorded. This encrypted information is referred to as contentkey. Since the content key is encrypted by using the recording unitnumber 25, it varies for each recording unit.

[0628] Next, the encryptor 21 encrypts the content 26 that is the AVdata to be recorded by using the content key.

[0629] The encrypted AV data is recorded, as the encrypted content 17,in the recording unit, wherein the data is to be recorded, of themagnetic disk medium 29 of the recording means 15 according to thecontrol of the control means 14.

[0630] In the following, the operation is repeated in the same manner,wherein the device unique key 13 is encrypted for each recording unit byusing the recording unit number 25 so as to generate a content key,wherein the generated content key is used to encrypt the content 26 andwherein the encrypted content 17 is recorded in the magnetic disk medium29.

[0631] The AV data, of which the copyright protection is necessary, isrecorded in the magnetic disk medium 29 in such a manner.

[0632] Next, the operation of the decryption means 63 is described.

[0633] The decryptor 59 reads in the device unique key 13 stored in thesecret region 18.

[0634] The recording means 15 reads out the CCI 27 from the magneticdisk medium 29 according to the control of the control means 14.

[0635] The decryption means 65 transfers the CCI 27 to the I/F 4.

[0636] The control means 14 designates the recording unit 39, from whichthe CCI is to be read out, and controls the recording means 15 to readout the encrypted content 17 that is the information stored in therecording unit 39.

[0637] The decryption means 63 finds the recording unit number 25 of therecording unit 39.

[0638] The decryptor 59 decrypts the device unique key by using therecording unit number 25 of the recording unit 39 from which data is tobe read out. This decrypted information is referred to as content key.Since the content key is recorded by using the recording unit number 25,it varies for each recording unit.

[0639] Next, the recording means 15 reads out the encrypted content 17that is the information stored in the recording unit, from which theinformation is read out, of the magnetic disk medium 29 according to thecontrol of the control means 14.

[0640] Next, the decryptor 33 decrypts the encrypted content 17 read outby the recording means 15 using the content key.

[0641] The recording means 63 transfers the decrypted content 37 to theI/F 4.

[0642] In the following, the operation is repeated in the same mannerwherein the device unique key 13 is decrypted for each recording unit byusing the recording unit number 25 so as to generate a content key,wherein the encrypted content 17 is read out so that the encryptedcontent 17 is decrypted by using the content key and wherein thedecrypted content 27 is transferred to the I/F 4 as an MPEG 2 transportstream.

[0643] The decryption means 65 decrypts the encrypted content 17 in sucha manner.

[0644] The same effects as of the first embodiment can be gained byusing the encryption means 64 and the decryption means 65, which aredescribed in the present embodiment, in the hard disk apparatus 2.

[0645] In addition, the encryption means 64 and the decryption means 65can of course be applied to a variety of modifications described in thefirst embodiment.

[0646] Here, though a variety of encryption means and decryption meansare shown in the fourth to the sixth embodiments, the invention is notlimited to these, but rather, the encryption means and the decryptionmeans, for example, as shown in FIGS. 17, 18 and 19 can also be used inplace of the encryption means 11 and the decryption means 12 of the harddisk apparatus 2.

[0647]FIG. 17(a) shows an encryption means 73. The encryption means 73uses the device unique key 13 so that the encryptor 67 encrypts thecontent 26.

[0648] In addition, FIG. 17(b) shows a decryption means 74. A decryptor68 decrypts the content 17 that is encrypted by the encryption means 73by using the device unique key 13 so that the decryption means 74outputs the decrypted content 37.

[0649]FIG. 18(a) shows an encryption means 75. The encryption means 75uses the recording unit number 25 so that an encryptor 69 encrypts thecontent 26.

[0650]FIG. 18(b) shows a decryption means 76. A decryptor 70 decryptsthe encrypted content 17, which is encrypted by the encryption means 75,by using the recording unit number 25 so that the decryption means 76outputs the decrypted content 37.

[0651]FIG. 19(a) shows an encryption means 77. Encryptor 71 encrypts thecontent 26 by using the device unique key 13 and the recording unitnumber 25 in the encryption means 77. Here, the encryption means 77 canhave a configuration wherein an adder is added so that the addercombines the device unique key 13 and the recording unit number 25 andso that the encryptor 71 encrypts the content 26 by using thisinformation.

[0652]FIG. 19(b) shows a decryption means 78. A decryptor 72 decryptsthe encrypted content 17 that is encrypted by the encryption means 77 byusing the device unique key 13 and the recording unit number 25 in thedecryption means 78.

[0653] Here, the decryption means 78 may have the configuration whereinan adder is added so that the adder combines the device unique key andthe recording unit number 25 and so that the decryptor 72 decrypts theencrypted content 17 by using this information.

[0654] (Seventh Embodiment)

[0655] Next, the seventh embodiment is described.

[0656]FIG. 20 shows a configuration of a hard disk apparatus 83 that isone embodiment of a recording apparatus and a reproduction apparatus ofthe present invention.

[0657] The hard disk apparatus 83 is provided with a CCI judgment means79 and a reproduction information management means 80 in addition to thehard disk apparatus 2 of the first embodiment. In addition, it isprovided with an I/F 81 in place of the I/F 4 of the first embodimentand a control means 82 in place of the control means 14 of the firstembodiment.

[0658] The point wherein the I/F 81 differs from the I/F 4 of the firstembodiment is that the I/F 81 makes a notification of starting therecording process to the controller 10 even in the case that the CCI ofthe AV data received from the IEEE 1394 bus 1 is “Copy Never” and thecontroller 10 can record the AV data under predetermined conditionsaccording to the notification from the I/F 81 even in the case that theCCI of the AV data is “Copy Never.”

[0659] In addition, the CCI judgment means 79 is a means of judging thevalue of the CCI of the reproduced AV data so as determine the value ofthe CCI after reproduction.

[0660] The reproduction information management means 80 is a means ofmanaging the reproduction information that is information of whether ornot the AV data recorded in the recording means 15 is once reproducedfor each recording unit.

[0661] In addition, the reproduction management means 80 is also a meansof managing the information of whether the AV data recorded in therecoding means 15 has been copied, or has not yet been copied, inanother device for each recording unit.

[0662] In reference to the reproduction information, it can be knownwhether or not the AV data recorded in the recording unit has been oncereproduced, or has not been reproduce at all, and the reproductioninformation can, for example, be represented with a flag of one bit.

[0663] In addition, in reference to copy information, it can be known ifthe AV data recorded in the recording unit has been once copied, or hasnot been copied at all.

[0664] The control means 82 is a means, in addition to the control means14 of the first embodiment, for supplying the CCI of the AV data duringreproduction to the CCI judgment means 79 so as to control the recordingmeans 15 to carry out, or not to carry out, the reproduction of the AVdata in accordance with the CCI of the AV data during reproduction andthe reproduction information that is generated and updated by thereproduction information management means 80 and for supplying the CCIof the AV data while being copied to another device to the CCI judgmentmeans 79 so as to control the recording means 15 to make, or not tomake, a copy of the AV data in accordance with the CCI of the AV datawhile being copied and the copy information generated and updated by thereproduction information management means 80.

[0665] Here, the CCI judgment means 79, the control means 82 and thereproduction information management means 80 of the present embodimentare examples of control means of the present invention while the I/F 81of the present embodiment is an example of an interface of the presentinvention.

[0666] Next, the operation of the present embodiment in such aconfiguration is described primarily in reference to the point differingfrom that of the first embodiment.

[0667] First, the operation at the time of recording is described.

[0668] AV data is sent from the host system.

[0669] The I/F 81 makes a notification of starting recording to thecontroller 84 in the case that the CCI of the AV data is “Copy Never.”

[0670] The encryption means 11 encrypts the AV data.

[0671] The recording means 15 records the encrypted AV data in themagnetic disk 29 according to the control of the control means 82. Atthis time, the CCI is also recorded in the same manner as in the firstembodiment.

[0672] Here, the control means 82 records the AV data in the case thatthe CCI is “Copy Never.” The AV data where the CCI recorded in therecording means 15 is “Copy Never,” however, becomes unreproducible apredetermined period of time after being recorded. How it becomesunreproducible after the predetermined period of time is describedbelow.

[0673] In addition, the control means 82 outputs the CCI so that itcopies the AV data of “Copy Once” and becomes unreproducible apredetermined period of time after being outputted for copying. This isalso described below.

[0674] The reproduction information management means 80 generatesreproduction information and copy information as follows when the AVdata is recorded in the recording means 15 for each recording unit.

[0675] That is to say, when the AV data is newly recorded, reproductioninformation is set to be not yet reproduced for each recording unitwhile copy information is set to be not yet copied. Furthermore, thetime when the AV data is recorded is recorded.

[0676] Next, the operation in the case that the AV data that is recordedin such a manner is reproduced is described.

[0677] The reproduction information management means 80 refers to thereproduction information of the AV data in the recording unit that is tobe reproduced and makes a notification to the control means 82.

[0678] Furthermore, the CCI judgment means 79 judges the value of theCCI of the AV data to be reproduced so as to determine the value of CCIin the case of reproduction and output.

[0679] That is to say, in the case that the CCI of the reproduced AVdata is “Copy Never,” the CCI at the time of being outputted from theI/F 81 is set to be “Copy Never.” In addition, in the case that the CCIof the reproduced AV data “Copy Once,” the CCI at the time of beingoutputted from the I/F 81 is changed to “No More Copy.” In addition, inthe case that the CCI is “Copy Free,” the CCI at the time of beingoutputted from the I/F 81 is set to be “Copy Free.” In addition, sincethe AV data of which the value of the CCI is “No More Copy” is notrecorded the CCI does not become “No More Copy.”

[0680] The recording means reproduces the AV data according to thecontrol of the control means 82.

[0681] The reproduction information management means 80 updates thereproduction management information as follows.

[0682] That is to say, when the AV data for the recording unit isreproduced a notification of this reproduction information is made tothe control means 82. In addition, when the AV data for the recordingunit is reproduced, the reproduction information for this portion is setas completion of reproduction.

[0683] In the case that the reproduction information of the AV data thatis being reproduced at present has already completed reproduction, thereproduction information management means 80 makes a notification to thecontrol means 82.

[0684] In addition, the reproduction information management means 80makes a notification of the time information of the AV data that isbeing reproduced at present to the control means 82.

[0685] The control means 82 carries out the following operation inaccordance with the value of the CCI before being changed by means ofthe CCI judgment means 79.

[0686] That is to say, in the case that the CCI is the AV data of “CopyNever,” the reproduction information controls the reproduction of thecompleted reproduction portion to stop. In addition, in the case that apredetermined period of time, for example, 240 hours (10 days), or more,has passed up to the present time since the time shown by the timeinformation concerning to the above AV data of which the notification ismade by the reproduction information management means 80, the above AVdata is controlled so as not to be reproduced.

[0687] In addition, in the case that the CCI is the AV data of “CopyOnce,” the reproduction is controlled to continue irrelevant of thevalue of the reproduction information.

[0688] In addition, in the case that the CCI is the AV data of “CopyFree,” the reproduction is controlled to continue.

[0689] The reproduced AV data is decrypted by the decryption means 12 insuch a manner.

[0690] Then, it is encrypted for transmission by the I/F 81 so as to beoutputted as an isochronous packet to the IEEE 1394 bus 1. At this time,the CCI determined by the CCI judgment means 79 is added to theisochronous header as described above.

[0691] Next, the operation in the case that the AV data recorded in sucha manner is copied is described.

[0692] The reproduction information controls means 80 refers to the copyinformation of the AV data of the recording unit to be copied and makesa notification to the control means 82.

[0693] Furthermore, the CCI judgment means 79 judges the value of theCCI of the AV data to be copied and determines the value of the CCI inthe case of reproduction and output.

[0694] That is to say, in the case that the CCI of the reproduced AVdata is “Copy Never,” the CCI at the time of the output from the I/F 81is either not set or set to be “Copy Never.” In addition, in the casethat the CCI of the reproduced AV data is “Copy Once,” the CCI at thetime of the output from the I/F 81 is made to remain “Copy Once” and isnot changed to “No More Copy.” In addition, in the case that the CCI is“Copy Free,” the CCI at the time of the output from the I/F 81 is set tobe “Copy Free.” In addition, since the AV data of which the value of theCCI is “No More Copy” is not recorded, the CCI does not become “No MoreCopy.”

[0695] The recording means reproduces the AV data to be copied inaccordance with the control of the control means 82.

[0696] The reproduction information management means 80 updates the copymanagement information as follows.

[0697] That is to say, when the AV data for the recording unit is copieda notification of this copy information is made to the control means 82.In addition, when the AV data for the recording unit is copied, the copyinformation for this portion is set as completion of copy.

[0698] The reproduction information management means 80 makes anotification to the control means 82 in the case that the copyinformation of the AV data that is being copied at present is alreadycopy completion.

[0699] The control means 82 operates as follows in accordance with thevalue of the CCI before being changed by means of the CCI judgment means79.

[0700] That is to say, in the case that the CCI is the AV data of “CopyNever,” the means controls the data not to be copied.

[0701] In addition, in the case that the CCI is the AV data of “CopyOnce,” the copy information is controlled not to copy the portion ofcopy completion while in the case that the copy information is notcopied, the copy information is controlled not to continue copying onlywhen the apparatus wherein the AV data of that portion is recorded is anapparatus for recording the above data for a backup.

[0702] In addition, in the case that the CCI is the AV data of “CopyFree,” the means controls the copying to be continued.

[0703] The AV data reproduced for being copied is decrypted by thedecryption means 12 in such a manner.

[0704] Then, it is encrypted for transmission by the I/F 81 so as to beoutputted as an isochronous packet to the IEEE 1394 bus 1. At this time,the CCI determined by the CCI judgment means 79 is added to theisochronous header in the above manner. It is received by another devicethrough the IEEE 1394 bus 1 so as to be recorded.

[0705] In addition, in the case that the CCI of the copied AV data is“Copy Once,” the AV data cannot be reproduced in a place where it isrecorded for the backup and it cannot be reproduced unless it isreturned to the original hard disk 83.

[0706] That is to say, the hard disk apparatus 83 of the presentembodiment records the AV data of “Copy Never” which can be reproducedonly once.

[0707] The AV data of which the CCI is “Copy Never” is not permitted tobe recorded and therefore, it is viewed and listened to only during thetime it is broadcast.

[0708] By using the hard disk apparatus 83 of the present embodiment,however, the AV data can be viewed and listened to during a time that isdifferent from the time when it is broadcast, while the intention of thecopyright holder is protected.

[0709] In addition, the AV data of which the CCI is “Copy Once” ispermitted to be copied once. That is to say, when the AV data of “CopyOnce” is recorded once, this AV data can only be reproduced from theapparatus in which the AV data is recorded.

[0710] By using the hard disk apparatus 83 of the present embodiment,however, the AV data of “Copy Once” can be copied only once whileremaining as the CCI of “Copy Once” and, therefore, the AV data can bemoved to another recording and reproduction apparatus while protectingthe intention of the copyright.

[0711] Here, though in the present embodiment when the AV data for therecording unit is reproduced the reproduction information managementmeans 80 makes a notification of this reproduction information to thecontrol means 82 and when the AV data for the recording unit isreproduced the reproduction information for this portion is set ascompletion of reproduction and thereby the hard disk apparatus 83 of thepresent embodiment is described of being able to reproduce only once theAV data of which the CCI is “Copy Never” the invention is not limited tothis. A method where the reproduction information management means 80updates the reproduction information may be as follows.

[0712] That is to say, the reproduction information management means 80may count the number of times that the AV data for the recording unit isreproduced so that the reproduction information of the AV data for thisrecording unit may be set as completion of reproduction only after ithas been reproduced for a predetermined number of times, for example,five times.

[0713] In addition, the reproduction information management means 80 maycount the number of times where a portion of one piece of AV data thatis recorded in each recording unit is reproduced so that thereproduction information management means 80 may set the portion of thereproduction management information that is recorded in the entirerecording units of this piece of AV data as completion of reproductionat the point in time when the entire portions that are recorded in theentire recording units of one piece of AV data are reproduced. In such aconfiguration, the hard disk apparatus 83 can reproduce a portion of theAV data of which the CCI is “Copy Never” as many times as desired andthe reproduction becomes impossible only at the point in time when theentirety of the AV data is reproduced.

[0714] Furthermore, though in the present embodiment, the AV data ofwhich the CCI is “Copy Never” is described as becoming unreproducibleafter a predetermined time has elapsed since the AV data is recorded,the invention is not limited to this, but rather, the AV data of whichthe CCI is “Copy Never” may become unreproducible depending on the moneyimposing condition. As for such a money imposing condition, there is acondition such that the AV data of which the CCI is “Copy Never” becomesreproducible in the case that a payment procedure of a predeterminedamount of money is carried out when the AV data is recorded while itbecomes unreproducible in the case that such a payment procedure is notcarried out.

[0715] Furthermore, though the present embodiment is described such thatthe AV data of which the CCI is “Copy Once” is controlled to continue tobe copied in the case that the copy information is not copied and onlyin the case that the apparatus wherein the AV data of that portion isrecorded is an apparatus wherein the above data is recorded for abackup, the invention is not limited to this, but rather, when apredetermined time has passed after the AV data of which the CCI is“Copy Once” is recorded this recorded AV data or the key used for theencryption at the time when this data is recorded may be erased.

[0716] The hard disk apparatus 83 of the present embodiment records theAV data of which the CCI is “Copy Never” or reproduces only once the AVdata of which the CCI is “Copy Once” so that the CCI remains “Copy Once”in the above manner and, therefore, the copyright can be interpreted asbeing breached even while the intention of the copyright holder is saidto be protected. That is to say, in the case that the CCI is “CopyNever,” it means that copying cannot be carried out by any means.Therefore, the utilization of the expanded CCI wherein the meaning ofthe CCI is expanded in such a manner is at present under investigation.In the expanded CCI, the meanings of “Copy Never” or “Copy Once” can beinterpreted as being expanded. The hard disk apparatus 83 of the presentembodiment can carry out the above described operation by using theexpanded CCI in place of the conventional CCI as described in the above.In the case that the hard disk apparatus 83 of the present embodimentcarries out the above described operation by using the expanded CCI insuch a manner, a breach of copyright is not committed.

[0717] When the hard disk apparatus 83 of the present embodiment is usedin such a manner, the AV data that is not permitted to be recorded canbe viewed and received at an arbitrary time other than the time when itis broadcast. In addition, it can be utilized as a backup apparatussince the AV data that is permitted to be copied only once can betransferred to another recording apparatus.

[0718] Here, viewing and listening to, or backing up, the AV data thatis not permitted to be recorded during an arbitrary time other than thetime when it is broadcast is further described in detail in thefollowing embodiments.

[0719] Here, a variety of the modifications described in the firstembodiment is of course possible in the hard disk apparatus 83 of thepresent embodiment.

[0720] Furthermore, though the hard disk apparatus 83 of the presentembodiment is described to be provided with the encryption means 11 andthe decryption means 12, the encryption means and the decryption meansthat are described after the description of the first embodiment may beused.

[0721] Furthermore, the data of the present invention is not limited tothe AV data in the present embodiment. It may be document data or imagedata sent through the Internet, or the like or a computer program suchas a game software or a document processing software sent through theInternet, or the like. In summary, the data of the present invention maybe any data that can be utilized by recording in the disk of the presentinvention and by reproducing from the disk of the present invention.

[0722] Furthermore, the interface of the present invention is notlimited to the IEEE 1394 interface in the present embodiment, butrather, may be an interface of the USB.

[0723] Furthermore, the disk of the present invention is not limited tothe magnetic disk medium in the present embodiment, but rather, may bean optical disk medium or an optical magnetic disk medium. In summary,the disk of the present invention may be any recording medium whereinthe data can only be accessed at random at the time of recording and/orat the time of reproduction.

[0724] Furthermore, the copy permission information of the presentinvention is not limited to the CCI or the expanded CCI in the presentembodiment, but rather, may be any information that only shows thepermission with respect to the copying of the data.

[0725] Here, though in the above embodiments, the values of the CCIadded to the AV data are described to include “Copy Never,” “Copy Once,”“No More Copy” and “Copy Free,” in the below described eighth toeleventh embodiments, the AV data of which the value of the CCI is anyof “Copy Never,” “Copy Once” or “No More Copy” is collectively dealtwith as a copy prohibition data. In addition, to which of the abovedescribed “Copy Never,” “Copy Once” or “No More Copy” the CCI of thecopy prohibition data corresponds is individually described in theeighth to the eleventh embodiments.

[0726] (Eighth Embodiment)

[0727] Next, the configurations of an AVHDD 1001 and an archive device1002 of the eighth embodiment of the present invention are described.

[0728]FIG. 21 shows a block diagram of the AVHDD 1001 and the archivedevice 1002 according to the eighth embodiment of the present invention.Here, FIG. 21 shows an STB (set top box) 1003 for convenience ofdescription.

[0729] Now, the AVHDD 1001 of the eighth embodiment of the presentinvention is, as shown in FIG. 21, formed of an encryption means 1004for encrypting data from an STB 1003 with an encryption key specific tothe AVHDD 1001, a first recording means 1005 for recording the dataencrypted by the encryption means 1004 in a recording medium within astorage means 1006, the storage means 1006 for storing data, a movemeans 1007 for moving the data stored in the storage means 1006 to thearchive device 1002 and a reproduction means 8 for decrypting andreproducing the data from the archive device 1002 encrypted with theencryption key specific to the AVHDD 1001. Here, the storage means 1006has a first recording medium for recording data and data is recorded inthis first recording medium.

[0730] Here, in the “embodiments of the invention” the AVHDD is used asa word representing an apparatus for recording or reproducing data suchas audio, video, or the like, by using a hard disk drive (HDD).

[0731] Next, the archive device 1002 according to the eighth embodimentof the present invention is formed, as shown in FIG. 21, of a secondrecording means 1009 for recording data from the AVHDD 1001 in a secondrecording medium 1010, the second recording medium 1010 and atransmission means 1011 for reading out the data recorded in the secondrecording medium 1010 and for transmitting it to the AVHDD 1001. Here,as for the archive device 1002, for example, a DVD apparatus or a D-VHSapparatus correspond to this. In the present embodiment, a DVD apparatusis used for the description as an example of the archive device 1002.Accordingly, a DVD corresponds to an example of the second recordingmedium 1010.

[0732] Here, the STB 1003 is a means of receiving data from, forexample, a broadcast station so as to output the data to the AVHDD 1001and of reproducing data from the AVHDD 1001, wherein the reproduced datais displayed on a display connected to the STB 1003 in the case that itis video data or the reproduced data is outputted from a speakerconnected to the STB 1003 in the case that it is audio data. Here, thedisplay and the speaker are not shown in the figures.

[0733] In addition, in the eighth embodiment, the AVHDD 1001 is used asan example of the data processing apparatus and the archive device 1002is used as an example of the recording and reproduction apparatusaccording to the present invention, respectively.

[0734] In addition, the first recording medium within the storage means1006 of the AVHDD 1001 may be a removable recording medium or astationary installed-type recording medium. In the same manner, thesecond recording medium 1010 within the archive device 1002 may be aremovable recording medium or a stationary installed-type recordingmedium.

[0735] In addition, the connection between the AVHDD 1001 and thearchive device 1002 may be carried out via an interface according to theIEEE 1394 standard or may be carried out via an interface according tothe IDE standard. Or it may be carried out via another interface. As forthe connection between the AVHDD 1001 and the STB 1003, it may becarried out via any interface.

[0736] Next, the operations of the AVHDD 1001 and the archive device1002 according to the eighth embodiment of the present invention aredescribed.

[0737] For convenience of the following description, the recordingcapacity of the first recording medium within the storage means 1006 ofthe AVHDD 1001 is assumed to be nearing the limit and is in thecondition wherein new data from the STB 1003 cannot be stored unlesssome data is overwritten, or is deleted, while the user has instructedthe AVHDD 1001 as well as the archive device 1002 to move the datawithin the storage means 1006 to the second recording medium 1010 withinthe archive device 1002.

[0738] Here, move of data means to move data recorded in, for example,the first recording medium to another, the second, recording medium sothat the moved data does not remain in the first recording medium afterthe move.

[0739] In addition, for convenience of the following description, thedata moved from the AVHDD 1001 to the archive device 1002 is encryptedby the encryption means 1004 using the encryption key specific to theAVHDD 1001 and is recorded in the first recording medium within thestorage means 1006 by means of the first recording means 1005. Inaddition, the above data that is the object moved is copy prohibiteddata that is prohibited from being copied for copyright protection whilethe move to another recording apparatus is permitted.

[0740] Here, the move means 1007 reads out the copy prohibited data,which has been encrypted with the encryption key specific to the AVHDD1001, from the first recording medium within the storage means 1106 andtransmits it to the archive device 1002. When the move means 1007transmits (moves) the copy prohibited data in such a manner, the movemeans 1007 outputs the copy prohibited data as data that can be copiedonly once.

[0741] Then, in the archive device 1002, the second recording means 1009records the copy prohibited data from the AVHDD 1001 in the secondrecording medium 1010. Here, the data transferred to the archive device1002 by the move means 1007 is transferred to the archive device 1002,as remaining encrypted, without being decrypted in the AVHDD 1001.Accordingly, the data recorded in the second recording medium 1010 bythe second recording medium 1009 is copy prohibited data that isencrypted by using the encryption key specific to the AVHDD 1001.

[0742] Next, a case is described wherein the encrypted copy prohibiteddata, which is recorded in the second recording medium 1010, isreproduced. As shown in FIG. 21 the archive device 1002 is not providedwith a means of decrypting and of reproducing the encrypted copyprohibited data and, therefore, it is necessary to move the data againto the reproduction means 1008 of the AVHDD 1001 that can decrypt andreproduce the copy prohibited data.

[0743] Therefore, in the case that the encrypted copy prohibited data,which is recorded in the second recording medium 1010, is reproduced,the transmission means 1011 reads out the data recorded in the secondrecording medium 1010, which is transmitted to the AVHDD 1001 and, then,in the AVHDD 1001, the reproduction means 1008 decrypts and reproducesthe encrypted copy prohibited data.

[0744] The decrypted and reproduced data is outputted at the STB 1003,which is displayed on the display connected to the STB 1003 in the caseof video data and is outputted from the display connected to the STB1003 in the case of audio data.

[0745] Even in the case that the recording capacity of the firstrecording medium within the storage means 1006 of the AVHDD 1001 hasalmost reached to the limit in the above described manner, the datawithin the storage means 1006 can be moved to another recording mediumwithout deleting the data by, for example, overwriting or the like thedata so as to gain the merit that the data transferred afterward can bereproduced.

[0746] In addition, even in the case that media in the same form as ofthe second recording medium 1010, which corresponds to the archivedevice 1002, is illegally copied by a large amount and then isdelivered, the data can only be reproduced by the AVHDD 1001 since thedata recorded in this media is the data encrypted by the encryptionmeans 1004 of the AVHDD 1001 by using the encryption key specific to theAVHDD 1001 and, therefore, the copy prohibited data that is the data ofthe object for copyright protection can be moved to another apparatus,that is to say, the archive device 1002 while protecting the copyright.Accordingly, a safe data move can be implemented. Here, a plurality ofencryption keys specific to the produced AVHDD 1001 differ,respectively.

[0747] Here, though, in the above described embodiment, the copyprohibited data is encrypted by the encryption means 1004 of the AVHDD1001 by using the encryption key specific to the AVHDD 1001, the copyprohibited data is not limited to the data that is encrypted by theencryption means 1004. For example, at a production stage of the AVHDD1001, the copy prohibited data encrypted by using the encryption keythat is particular to the AVHDD 1001 may be recorded in the firstrecording medium within the storage means 1006.

[0748] In addition, though, in the above described embodiment, the copyprohibited data is recorded in the first recording medium within therecording means 1006 after being encrypted by the encryption means 1004,the encryption means 1004 may be provided between the storage means 1006and the move means 1007 so that the copy prohibited data is encrypted byusing the encryption key specific to the AVHDD 1001 at the time when itis moved by means of the move means 1007. In summary, the copyprohibited data that is to be transferred by the move means 1007 may beany data that is encrypted by using the encryption key specific to theAVHDD 1001, at least, at the time when being outputted from the AVHDD1001.

[0749] In addition, in the present embodiment, the copy prohibited datais data that is allowed to be transferred to another recording apparatusand that is prohibited from being copied, wherein the “copy prohibiteddata” in “Embodiments of the Invention” includes the data represented as“01” in 2 bits meaning “prohibition of further copying” and the datarepresented as “11” in 2 bits meaning “absolute copy prohibition.”

[0750] In addition, the transmission means 1011 in the above embodimentdescribed in reference to FIG. 21 may be replaced with a high speedtransmission means 1015 that transmits the data recorded in the secondrecording medium 1010 to the AVHDD 1001 at a speed N (N is a positivenumber that exceeds 1) times as fast as the conventional speed as shownin FIG 23. In this case, the AVHDD 1001 of FIG. 21 is replaced with anAVHDD 1012 that is further provided with a buffer 1014 as a data storagemeans so that the data from the high speed transmission means 1015 istemporarily stored in the buffer 1014 and, then, the temporarily storeddata can be reproduced in the reproduction means 1008.

[0751] Thus the merit is gained that a data transfer is carried out fromthe archive device 1013 to the AVHDD 1012 at the speed N times as fastas the standard (high speed) and the data can be normally reproduced inthe AVHDD 1012. Here, the buffer 1014 may be provided within the storagemeans 1006. In addition, “the speed N times as fast as the conventionalspeed” means a speed faster than the data reproduction speed that isrequired when the reproduction means 1008 reproduces data that is viewedand listened to by the user.

[0752] Here, though, in the example described in reference to FIG. 23, ahigh speed transmission means 1015 is provided with the archive device1013 so that data is transferred from the archive device 1013 to theAVHDD 1012 at the speed N time as fast as the conventional speed (highspeed), the move means 1007 of the AVHDD may be replaced with a highspeed move means of moving the data to the archive device at the speed N(N is a positive number that exceeds 1) times as fast as theconventional speed. In this case, it is preferable to provide a bufferthat temporarily stores data in the archive device. In the case that ahigh speed move means is provided in the AVHDD in such a manner, thereis the merit that the data move can be carried out from the AVHDD to thearchive device for a short period of time. In addition, in the belowdescribed AVHDD in Embodiment 2, effects are gained that a data move canbe carried out for a short period of time in the case that a high speedmove means is provided in place of the move means.

[0753] In addition, though in the above described embodiment, thearchive device 1002 is not provided with a means of decryption and ofreproducing the encrypted data by using the encryption key specific tothe AVHDD 1001, the archive device 1002 may be replaced with an archivedevice 1016 that is provided with a decryption and reproduction means1017 for decrypting and reproducing the encrypted data by using theencryption key specific to the AVHDD 1001 as shown in FIG. 23 so thatthe encrypted data may be decrypted and reproduced by using theencryption key specific to the AVHDD 1001 in the archive device 1016without a data transmission to the AVHDD 1001.

[0754] In the case that the encrypted data can be decrypted andreproduced by using the encryption key specific to the AVHDD 1001 in thearchive device 1016 in the above manner, the problem is solved that thearchive device 1002 and the AVHDD 1001 must be connected to each otheronly for reproducing the data.

[0755] Here, the encryption key specific to the AVHDD 1001 becomesnecessary in order for the decryption and reproduction means 1017 of thearchive device 1016 to decrypt and reproduce the encrypted data and,therefore, an IC card slot may be provided in advance in the archivedevice 1016 so that in the case that the IC card 1018 wherein theencryption key specific to the AVHDD 1001 is recorded is inserted to theIC card slot as shown in FIG. 23, the decryption and reproduction means1017 acquires the encryption key specific to the AVHDD 1001 from the ICcard 1018 so as to decrypt and reproduce the encrypted data by usingthis encryption key.

[0756] In addition, in the case that the IC card 1018 is used, inaddition to the decryption and reproduction means 1017, a keyreproduction means of reproducing the IC card 1018 may be provided inthe archive device 1016. In addition, a key memory means of storing theencryption key specific to the AVHDD 1001 from the IC card 1018 may beprovided in the archive device 1016. In the case that a key memory meansis provided in the archive device 1016 in such a manner, the problem canbe avoided that the IC card 1018 must be inserted into the IC card slotwhenever the encrypted data is decrypted and is reproduced by using theencryption key specific to the AVHDD 1001 that is recorded in the secondrecording medium 1010. Here, as for the key recorded in the IC card1018, a secret key and a public key can be combined in order to preventthe leakage of the key.

[0757] In addition, though, in the above description, the decryption andreproduction means 1017 acquires the encryption key specific to theAVHDD 1001 directly or indirectly from the IC card 1018, the decryptionand reproduction means 1017 may acquire the encryption key from a keydisk or a key cassette, in place of the IC card 1018, wherein theencryption key specific to the AVHDD 1001 is recorded or hidden. Here,the encryption key specific to the AVHDD 1001 may be recorded in thesecond recording medium 1010. In this case, the IC card 1018, the keydisk and the key cassette become unnecessary.

[0758] In addition, instead of using the IC card 1018, the key disk orthe key cassette, a means of transmitting the encryption key specific tothe AVHDD 1001 is provided in the AVHDD 1001 and a means of receivingthe encryption key from the AVHDD 1001 is provided in the archive device1016 so that the decryption and reproduction means 1017 decrypts andreproduces the encrypted data by using the transmitted encryption key.

[0759] In addition, though in the above described embodiment, the AVHDD1001 unconditionally moves the encrypted data to the archive device 1002as shown in FIG. 21, as shown in FIG. 24, the second recording medium1010 of the archive device 2 of FIG. 21 may be replaced with the secondrecording medium 1021 wherein the certification information thatindicates the recording medium corresponding to the AVHDD 1019 isrecorded and, at the same time, the AVHDD 1001 may be replaced with theAVHDD 1019 wherein a judgment means 1020 for judging whether or not thesecond recording medium 1021 is a recording medium corresponding to theAVHDD 1019 is provided so that the move means 1007 moves data from theAVHDD 1019 to the archive device 1002 only in the case that the judgmentmeans 1020judges that the second recording medium 1021 is the recordingmedium corresponding to the AVHDD 1019.

[0760] Here, the judgment means 1020 judges that the second recordingmedium 1021 is the recording medium corresponding to the AVHDD 1019 inthe case that the certification information is recorded in the secondrecording medium 1021 and judges that the second recording medium 1021does not correspond to the AVHDD 1019 in the case that the certificationinformation is not recorded.

[0761] In addition, the second recording medium 1021 wherein thecertification information is recorded may be a disk of which the colorof the surface differs from the color of the surface of the recordingmedium, wherein the certification information is not recorded in orderto distinguish the second recording medium wherein the certificationinformation is recorded from the recording medium wherein thecertification information is not recorded and, moreover, the recordingmedium wherein the certification information is recorded is a recordingmedium for copyright protected information and, therefore, may be moreexpensive by a predetermined amount than the recording medium whereinthe certification information is not recorded. Then the entirety, or aportion of, the difference between the recording medium wherein thecertification information is recorded and the recording medium whereinthe certification information is not recorded may be returned to thecopyright holder, which may be an individual or an organization.

[0762] Here, instead of the configuration wherein in the case that thesecond recording medium 1021 is a recording medium corresponding to theAVHDD 1019 data is transferred from the AVHDD 1019 to the archive device1002, in the case that the archive device 1002 is an apparatuscorresponding to the AVHDD 1019 data may be moved from the AVHDD 1019 tothe archive device 1002. In this case, the AVHDD 1019 is provided with ajudgment means that judges whether or not the archive device 1002 is anapparatus that corresponds to the AVHDD 1019.

[0763] In addition, when a management apparatus having a fee imposingability concerning, at least, the move of the copy prohibited data isconfirmed to be connected to the interface to which AVHDD 1001 and thearchive device 2 are connected, the transfer means 1007 of the AVHDD1001 may transfer the copy prohibited data to the archive device 2.Here, an STB can be cited as an example of the management apparatus.

[0764] In addition, in the above described embodiment the copyprohibited data is moved from the AVHDD to the archive device. That isto say, after the copy prohibited data is moved to the archive device,the copy prohibited data is deleted from the AVHDD. However, a case maybe considered wherein the copy prohibited data cannot be processed inthe archive device and, therefore, in some cases it is preferable thatthe copy prohibited data be allowed to remain in the AVHDD as a backup.

[0765] In this case, when the move means 1007 of each of the AVHDDs inthe above described embodiment is replaced with a copy means of copyingthe copy prohibited data in the archive device, the copy prohibited datais transmitted to the archive device and, at the same time, the copyprohibited data can be stored as a backup within the AVHDD so as toproduce the merit wherein the copy prohibited data stored in the AVHDDas a backup can be utilized even in the case that the copy prohibiteddata are not able to be processed in the archive device.

[0766] Here, as one example of the configuration of the AVHDD that isprovided with a copy means, FIG. 28 shows the case wherein the .AVHDD1001 that is provided with a move means 1007, shown in FIG. 21, isreplaced with the AVHDD 1081 that is provided with a copy means 1080instead of the move means 1007.

[0767] (Ninth Embodiment)

[0768] Next, the configurations of an AVHDD 1022 and an archive device1023 according to the ninth embodiment of the present invention aredescribed.

[0769]FIG. 25 shows a block diagram of the AVHDD 1022 and the archivedevice 1023 according to ninth embodiment of the present invention.Here, for convenience of description, FIG. 25 also shows the STB 1003 inthe same manner as in FIG. 21 of the above described eighth embodiment.

[0770] Now, the AVHDD 1022 according to the ninth embodiment of thepresent invention is formed, as shown in FIG. 25, of a third recordingmeans 1024 of recording data from the STB 1003 in a recording mediumwithin a storage means 1025, the storage means 1025 for storing data, aplain sentence conversion means 1026 for converting data stored in thestorage means 1025 into a plain sentence and a move means 1027 formoving the data that is converted into a plain sentence by means of theplain sentence conversion means 1026 and that is stored in the storagemeans 1025 into the archive device 1023.

[0771] An archive device 1023 according to the ninth embodiment of thepresent invention is formed of, as shown in FIG. 25, an encryption means1028 for encrypting the data from the AVHDD 1022 by using the encryptionkey specific to the archive device 1023, a fourth recording means 1029for recording the data encrypted by the encryption means 1028 in a thirdrecording medium 1030, the third recording medium 1030 and areproduction means 1031 for decrypting and reproducing the data recordedin the third recording medium 1030 by using the encryption key specificto the archive device 1023. Here, as for the archive device 1023, forexample, a DVD apparatus or a D-VHS apparatus correspond to this. A DVDapparatus is used as an example of the archive device 1023 and a DVD isused as an example of the third recording medium 1030 in the presentembodiment.

[0772] In addition, in the ninth embodiment an AVHDD 1022 is used as oneexample of the data processing apparatus of the present invention and anarchive device 1023 is used as one example of the recording andreproduction apparatus, respectively.

[0773] In addition, the recording medium within the storage means 1025of the AVHDD 1022 may be a removable recording medium or may be astationary installed-type recording medium. A third recorded medium 1030within the archive device 1023 may be a removable recorded medium or maybe a stationary installed-type recording medium in the same manner.

[0774] In addition, the connection between the AVHDD 1022 and thearchive device 1023 may be effected via any interface in the same manneras in the eighth embodiment described in reference to FIG. 21.

[0775] Next, the operations of the AVHDD 22 and the archive device 23according to the ninth embodiment of the present invention aredescribed.

[0776] It is assumed that the user directs the AVHDD 1022 and thearchive device 1023 to transfer data within the storage means 1025 tothe third recorded medium 1030 within the archive device 1023. Here, themove of data means, as described in the eighth embodiment, that, forexample, the data recorded in the first recording medium is moved intoanother, the second recording medium so that the moved data does notremain in the first recording medium after the move.

[0777] In addition, for the convenience of the description below, thedata that is the object moved is copy prohibited data that is allowed tobe moved to another recording apparatus and is prohibited from beingcopied for copyright protection and is recorded in the recording mediumwithin the storage means 1025 by means of the third recording medium1024.

[0778] Here, at this time, a plain sentence conversion means 1026converts data stored in the storage means 1025 into plain sentenceswhile a move means 1027 reads out the copy prohibited data of a plainsentence from the recording medium within the storage means 1025 andtransmits it to the archive device 1023. In such a manner when the movemeans 1027 transmits (moves) the copy prohibited data, the move means1027 outputs the copy prohibited data only once as data of which copyingis allowable.

[0779] Then, in the archive device 1023, the encryption means 1028encrypts the data from the AVHDD 1022 by using the encryption keyspecific to the archive device 1023 and the fourth recording means 1029records the data that is encrypted by the encryption means 1028 in thethird recording medium 1030. Here, the data is treated as copyprohibited data at the time when it is inputted to the archive device1023 or at the time when it is recorded in the third recording medium1030.

[0780] Here, transmission data in the transmission path of the data fromthe AVHDD 1022 to the archive device 1023 may be, for example, protectedby the DTCP.

[0781] Next, a case is described wherein the encrypted copy prohibiteddata that is recorded in the third recording medium 1030 is reproducedby using the encryption key specific to the archive device 1023. In thiscase, the reproduction means 1031 reproduces copy prohibited datarecorded in the third recording medium 1030 by using the encryption keyspecific to the archive device 1023.

[0782] Since the archive device 1023 encrypts and records data by usingthe encryption key specific to the archive device 1023 in the abovemanner, there is the merit that the data recorded in the archive device1023 can be reproduced.

[0783] Here, though in the above described embodiment the encryptionmeans 1028 of the archive device 1023 encrypts the copy prohibited datafrom the AVHDD 1022 by using the encryption key specific to the archivedevice 1023, in the case that the encryption key is recorded in thethird recording medium 1030, the encryption means 1028 may encrypt thecopy prohibited data from the AVHDD 1022 by using the encryption keyrecorded in the third recording medium 1030. In this case, thereproduction means 1031 reproduces the copy prohibited data by using theencryption key that is recorded in the third recording medium 1030.

[0784] In addition, though in the above described embodiment the datamoved from the AVHDD 1022 to the archive device 1023 is plain sentencedata, the moved data may be the data encrypted by using the encryptionkey specific to the archive device 1023 or may be the data encrypted bythe encryption key that is recorded in the third recording medium 1030in the case that the encryption key is recorded in the third recordingmedium 1030.

[0785] In this case, the AVHDD 1022 is provided with the encryptionmeans of encrypting the copy prohibited data by using the encryption keyspecific to the archive device 1023 or by using the encryption keyrecorded in the third recording medium 1030. In addition, the AVHDD 1022is provided with a means of acquiring the encryption key specific to thearchive device 1023 from the archive device 1023 and a means ofacquiring the encryption key described in the third recording medium1030 from the archive device 1023. Here, the encryption means 28 becomesunnecessary in the archive device 1023.

[0786] In addition, the data moved from the AVHDD 1022 to the archivedevice 1023 may be data in a format used in the archive device 1023. Inthis case, the AVHDD 1022 can be provided with a format conversion meansthat converts the transferred data into data in a format for the archivedevice 1023. In addition, when data is recorded within the storage means1025 in the AVHDD 1022, the data may be recorded in a format used in thearchive device 1023.

[0787] In addition, as described in the eighth embodiment in referenceto FIG. 24, the AVHDD 1022 is provided with a judgment means of judgingwhether or not the third recording medium 1030 is a recording mediumcorresponding to the AVHDD 1022 so that the move means 1027 may move thecopy prohibited data that is in plain sentences or that is encrypted tothe archive device 1023 in the case that the third recording medium 1030is judged to be a recording medium corresponding to the AVHDD 1022according to the above judgment means.

[0788] Here, in the case that a key is attached to the third recordingmedium 1030 that shows that the third recording medium 1030 is arecording medium corresponding to the AVHDD 1022, the judgment meansprovided in the AVHDD 1022 may judge whether or not the third recordingmedium 1030 is a recording medium corresponding to the AVHDD 1022 byutilizing the key that is attached to the third recording medium 1030.

[0789] In addition, instead of the configuration wherein data move iscarried out by judging whether or not the third recording medium 1030 isa recording medium corresponding to the AVHDD 1022, data transfer may becarried out by judging whether or not the archive device 1023 is anapparatus corresponding to the AVHDD 1022. In this case, AVHDD 1022 isprovided with a judgment means that judges whether or not the archivedevice 1023 is an apparatus corresponding to the AVHDD 1022 and the movemeans 1027 may move the copy prohibited data that is of plain sentenceor that is encrypted to the archive device 1023 in the case that thearchive device 1023 is judged to be an apparatus corresponding to theAVHDD 1022 according to above judgment means.

[0790] Here, in the case that the archive device 1023 has a key thatshows that the archive device is an apparatus corresponding to the AVHDD1022, the judgment means provided in the AVHDD 1022 may utilize the keythat the archive device 1023 has so as to judge whether or not thearchive device 1023 is an apparatus corresponding to the AVHDD 1022.

[0791] In addition, when a management apparatus that has a fee imposingability concerning the move of, at least, copy prohibited data isconfirmed to be connected to the interface to which the AVHDD 1022 andthe archive device 1023 are connected, the move means 1027 of the AVHDD1022 may transfer the copy prohibited data to the archive device 1023.Here, an STB can be cited as an example of the management apparatus.

[0792] In addition, the AVHDD in the eighth embodiment and the AVHDD 2may, respectively, be provided with a means of transmitting feeimposition information concerning the move of data to a managementapparatus for managing each of the AVHDDs at the time when the data moveis carried out. In addition, an STB 1003 in which a means of imposing afee is integrated can be used as an example of the management apparatus.

[0793] In addition, in the above described embodiment, the copyprohibited data is moved from the AVHDD to the archive device. That isto say, the copy prohibited data is deleted from the AVHDD after thecopy prohibited data is moved to the archive device. However, there maybe a case wherein the copy prohibited data cannot be processed in thearchive device and, therefore, in some cases it is preferable to allowthe copy prohibited data to remain in the AVHDD as a backup.

[0794] In this case, when the move means 1027 of the AVHDD of the abovedescribed embodiment is replaced with a copy means of copying the copyprohibited data in the archive device, the copy prohibited data can betransmitted to the archive device and the copy prohibited data can bestored in the AVHDD as a backup so as to produce the merit that the copyprohibited data stored in the AVHDD as a backup can be utilized even inthe case that the copy prohibited data cannot be processed in thearchive device.

[0795] Here, as one example of the configuration of the AVHDD that isprovided with a copy means, FIG. 29 shows a case wherein the AVHDD 1022,which is provided with the move means 1007 shown in FIG. 24, is replacedwith the AVHDD 1091 that is provided with the copy means 1090 instead ofthe move means 1027.

[0796] (Tenth Embodiment)

[0797] Next, an encryption data decrypting and recording systemaccording to the tenth embodiment of the present invention is described.

[0798]FIG. 30 shows the configuration of the encryption data decryptingand recording system according to the present tenth embodiment. As shownin FIG. 30, the encryption data decrypting and recording systemaccording to the present tenth embodiment is formed of five recordingapparatuses 1100 a to 1100 e and a decrypting and recording apparatus1101.

[0799]FIG. 31 shows the configuration of each of the recordingapparatuses 1100 according to the present tenth embodiment. As shown inFIG. 31, each recording apparatus 1100 has a recording means 1102 and anoutput means 1103 that outputs data recorded in the recording means1102. Here, the data recorded in the recording means 1102 is data gainedby encrypting the copy prohibited data that is prohibited from beingcopied and the encrypted copy prohibited data of the same content isrecorded in the recording means 1102 of each recording apparatus 1100.

[0800] Next, FIG. 32 shows the configuration of the decrypting andrecording apparatus 1101 according to the present tenth embodiment. Asshown in FIG. 32, the decrypting and recording apparatus 1101 has adecryption means 1104 and a recording means 1105. Here, the decryptionmeans 1104 is a means of decrypting the encrypted copy prohibited datathat is outputted from the recording apparatus 1100 while the recordingmeans 1105 is a means of recording the encrypted copy prohibited data orunencrypted copy prohibited data, which is data that has the samecontent as that of the copy prohibited data recorded in the recordingapparatus 1100.

[0801] In addition, in the above described encryption data decryptingand recording system according to the present tenth embodiment, thoughthe data of the same content is recorded in five recording apparatuses1100 a to 1100 e and in the decrypting and recording apparatus 1101,respectively, the encrypted copy prohibited data can only be decryptedby the decryption means 1104 of the decrypting and recording apparatus1101.

[0802] Accordingly, when the encryption data decrypting and recordingsystem according to the present tenth embodiment is used, effects aregained that copyright is protected while the data of which the copyrightis to be protected can be backed up.

[0803] Here, though in the encryption data decrypting and recordingsystem according to the above described embodiment, the recordingapparatus 1100 is provided with 1100 a to 1100 e, the number of therecording apparatuses 1100 is not limited to 5. In summary, any pluralnumber of recording apparatuses may exist.

[0804] (Eleventh Embodiment)

[0805] Next, an AVHDD 1032, according to the eleventh embodiment of thepresent invention is described. Here, transmission of data from theAVHDD 1032 is described in the eleventh embodiment and the transmitteddata is recorded in the DVD 1037 of the DVD apparatus 1033.

[0806]FIG. 26 shows a block diagram of the AVHDD 1032 and the DVDapparatus 1033 according to the eleventh embodiment of the presentinvention.

[0807] Now, the AVHDD 1032 according to the eleventh embodiment of thepresent invention is formed of, as shown in FIG. 26, a storage means1034 of storing data and a transmission means 1035 of transmitting datastored in the storage means 1034 to the DVD apparatus 1033.

[0808] The DVD apparatus 1033 according to the eleventh embodiment ofthe present invention is formed of, as shown in FIG. 26, a fifthrecording means 1036 of recording data from the AVHDD 1032 in the DVD1037 and a reproduction means 1038 of reproducing data recorded in thefifth recording means 1036.

[0809] Here, the AVHDD 1032 of the eleventh embodiment is used as oneexample of the data transmission apparatus of the present invention.

[0810] In addition, the connection between the AVHDD 1032 and the DVDapparatus 1033 may be effected via any type of interface.

[0811] Next, the operations of the AVHDD 1032 and the DVD apparatus 1033according to the eleventh embodiment of the present invention aredescribed.

[0812] Here, the data transmitted by the AVHDD 1032 is assumed to be astream formed of a plurality of data packets. FIG. 27 shows theconfiguration of a portion of this stream. This stream is, as shown inFIG. 27, a stream formed of a plurality of blocks formed of five datapackets D0, D1, D2, D3 and D4, wherein D0, D1, D2, D3 and D4 are,respectively, data packets that are chronologically sequential inascending order of number and the data is encrypted in a chain manner sothat each packet cannot be reproduced unless the packet chronologicallyone before is reproduced.

[0813] Accordingly, when the data packets D0, D1 and D2 are picked up,the data packet D0 is chronologically followed by the data packet D1,which is then followed by the data packet D2 so that the data packet D1is not reproduced unless the data packet D0 is reproduced while the datapacket D2 is not reproduced unless the data packet D1 is reproduced.

[0814] As for the operation, at the time when the AVHDD 1032 transmitssuch a stream to the DVD apparatus 1033, when the transmission means1035 of the AVHDD 1032 transmits a stream stored in the storage means1034 to the DVD apparatus 1033, the data packets of each block formingthe stream are transmitted in the order of D4, D3, D2, D1 and D0.

[0815] The fifth recording means 1036 in the DVD apparatus 1033 recordsthe data from the AVHDD 1032 in the DVD 1037.

[0816] When the data recorded in the DVD 1037 is reproduced thereproduction means 1038 reproduces the data packets in the order of D0,D1, D2, D3 and D4 with respect to each block forming the stream and thenreproduces the entire stream.

[0817] The data packets transmitted from the AVHDD 1032 to the DVDapparatus 1033 are transmitted in the order of D4, D3, D2, D1 and D0 inthe above manner and, therefore, the block formed of the data packetsD0, D1, D2, D3 and D4 is not reproduced unless D4, D3, D2, D1 and D0 aretransmitted in the case that the power is cut off in the course of datatransmission due to a power failure, or the like, so that the situationwhere transmission data is decrypted in another apparatus can be avoidedeven in the case that the transmission data is leaked to the apparatus.

[0818] Here, though in the above described embodiment chain encryptionof the data packets D0, D1, D2, D3 and D4 is not described in detail,the data packets D0, D1, D2, D3 and D4 that are encrypted in a chainmanner may be stored in the storage means 1034 of the AVHDD 1032 or thedata packets of each block may be encrypted in a chain manner at thetime when the transmission means 1035 of the AVHDD 1032 transmits thestream by providing the AVHDD 1032 with a means of carrying out a chainencryption.

[0819] In addition, though in the above described embodiment the streamis formed of a plurality of blocks formed of five data packets D0, D1,D2, D3 and D4, the number of data packets that form each block is notlimited to five. In addition, the stream is not limited to a streamformed of a plurality of blocks. The stream may not be formed of aplurality of blocks, but rather, may be a stream formed of a pluralityof data packets. In this case, the transmission means 1035 transmits thedata packets forming the stream in the order from the rear to the head.

[0820] In addition, though in the above described embodiment thetransmission of the stream is described, the data packets D0, D1, D2, D3and D4 are closely observed and this results in finding that the datapackets D1 to D4 are erased from the recording medium before the move ofthe stream after the move of the data packets D4, D3, D2, and D1 hasbeen completed and the data packet D0 is transferred after the aboveerasure has been completed and, then, the data packet D0 is erased fromthe recording medium before the transfer of the stream.

[0821] Here, in the above described eighth to eleventh embodiments, theAV data of which the value of the CCI is any of “Copy Never,” “CopyOnce” or “No More Copy” is collectively referred to as copy prohibiteddata while in the following twelfth to sixteenth embodiments the contentwherein copying of the AV data, or the like, of which the CCI is “CopyNever” is prohibited is referred to as copy prohibited content.

[0822] (Twelfth Embodiment)

[0823]FIG. 33 is a configuration diagram of a recording and reproductionapparatus according to the twelfth embodiment of the present invention.As shown in the figure, a judgment information detection means 2010 is ameans of detecting judgment information with respect to the copylimitation in broadcasting signals from the outside, a time informationacquisition means 2011 is a means of a acquiring time signals withrespect to time from broadcasting signals from the outside, a recordingand reproduction means 2012 is a means of recording and reproducingbroadcasting signals from the outside, a recording medium 2013 is ameans of storing broadcast data that can be implemented by a hard disk,or the like and that allows recording and reproduction at the same timeand allows a random access, a control input interface (hereinafter,control input I/F) 2015 is a means of receiving the control from theuser and a switching means 2016 is a means of receiving an input fromthe recording and reproduction means 2012 and a broadcast input from theoutside so as to select either of the se and output it to the externalmonitor, or the like. In addition, in the recording medium 2013, therecording buffer 2014 is a region that exclusively records the data thatis restricted from being copied. Here, the broadcast that is dealt within the present embodiment is a digital broadcast using an MPEG transportstream or an MPEG program stream (hereinafter, referred to, in general,as MPEG stream) and means concerning the decoding process, and the like,are omitted. Each of the following embodiments is described in the samemanner. In addition, the judgment information detection means 2010, thetime information acquisition means 2011 and the recording andreproduction means 2012 are examples of recording means of the presentinvention.

[0824] The operation of the recording and reproduction apparatusaccording to the twelfth embodiment of the present invention that hasthe above described configuration is described as follows.

[0825] First, the judgment information detection means 2010 refers toeach packet forming a header or a data column when receiving an input ofthe MPEG stream from the outside and detects information concerningcopyright such as a copy guard or CCI (copy control information) so asto judge whether or not a copy prohibition or a copy restriction hasbeen placed on the inputted content. Here, it is assumed that only thecopy prohibited content that is prohibited from being copied isinputted.

[0826] Next, when the inputted MPEG stream is identified as the copyprohibited content, the judgment information detection means 2010outputs detection information to the recording and reproduction means2012. As examples of detection information, copyright information, acopy guard, and the like, included in the MPEG stream are cited. Therecording and reproduction means 2012 prepares to record the MPEG streamin the recording buffer 2014 within the recording medium 2013 based onthe detection information after the recording and reproduction meansreceives the detection information.

[0827] When an MPEG stream is inputted from the outside via the judgmentinformation detection means 2010, the recording and reproduction means2012 records the MPEG stream in the recording buffer 2014.

[0828] Next, the operation of recording in the recording buffer 2014 bythe recording and reproduction means 2012 is described in detail. FIG.34 is a time chart for describing the operation of the recording andreproduction apparatus according to the present twelfth embodiment. Asshown in the figure, as an example of the operation of the presentembodiment, it is assumed that a recording and reproduction apparatusaccording to the present embodiment is used in order to temporarilyrecord the amount of data that corresponds to a 90 minute period ofbroadcast time in the recording buffer 2014 and that the copy prohibitedcontent of the 120 minutes of broadcast time that is broadcast duringthe period of time of the live broadcast 2020 is viewed and listened tobased on the time shift reproduction after 90 minutes has elapsed sincethe broadcast starting time.

[0829] First, at the time when the broadcast starts, the recording andreproduction means 2012 starts recording data that form the copyprohibited content in the recording buffer 2014. After the broadcaststarting time, the recording and reproduction means 2012 keepssequentially recording the data in the recording buffer 2014 and doesnot carry out reproduction.

[0830] On the other hand, the time information acquisition meansacquires time information such as a PCR packet or a time stamp from theMPEG stream so as to start measuring the recording time at the point intime when the recording and reproduction means 2012 starts recording thecopy prohibited content in the recording buffer 2014.

[0831] Next, after the period of time of recording 2021 (90 minutes) haselapsed according to the measurement by the time information acquisitionmeans 2011 since the broadcast starting time, the recording andreproduction means 2012 starts erasing the data recorded after thebroadcast starting time from the recording buffer 2014 while continuingthe sequential recording of the MPEG stream that is inputted from theoutside. Here, in this example of the operation, the time when theperiod of time of recording 2021 has elapsed since the broadcaststarting time is the viewing and listening starting time when theviewing and listening period of time 2024 starts due to the time shiftreproduction and, therefore, the recording and reproduction means 2012reproduces the recorded data before it is erased and outputs it to anexternal monitor via the switching means 2016.

[0832] That is to say, the data that corresponds to the portion 2022 aof the first 30 minutes (content that is broadcast during the period oftime of the live broadcast 2020 a) from among the data recorded duringthe period of time of recording 2021 is reproduced (content viewed andlistened to during the viewing and listening period of time 2024 aaccording to the time shift reproduction) after 90 minutes has elapsedsince the broadcast starting time, that is when the viewing andlistening starting time according to the time shift reproduction and,after that, it is immediately erased.

[0833] Next, when the period of time of recording and reproduction 2022a has elapsed since the viewing and listening starting time according tothe time shift reproduction, the recording and reproduction means 2012continues the sequential recording of the data until the broadcastcompletion time during the period of time of recording and reproduction2022 b and, at the same time, reproduction of the data that has alreadybeen stored in the recording buffer 2014 is continued so that itsucceeds the data portion 2022 a.

[0834] Next, at the time when the broadcast is completed, the recordingand reproduction means 2012 stops the sequential recording of the dataand implements reproduction of the data recorded in the recording buffer2014 until the viewing and listening completion time (period of time ofreproduction 2023).

[0835] Here, in the above described operation, the reproduced data maybe stored once in the recording buffer 2014 during the period of time ofrecording and reproduction 2022 b and during the period of time ofreproduction 2023 so as to be erased together after the viewing andlistening completion time and it is desirable to erase the dataimmediately after the reproduction in order to prevent the situationwhere the data is stored in the recording medium 2013 in the case thatthe power of the recording and reproduction apparatus is cut off due toan accident.

[0836] In addition, in the case that the time shift reproduction is notcarried out after the viewing and listening starting time, the recordingand reproduction means 2012 erases the entire data recorded in therecording buffer 2014. Thereby, the copy prohibited content can beprevented from being reproduced in a form other than by time shifting.

[0837] In addition, though in the above description when the judgmentinformation detection means 2010 detects judgment information includedin the data of the copy prohibited content, the recording andreproduction means 2012 automatically starts the recording operation forthe time shift reproduction, the start of the recording operation of therecording and reproduction means 2012 may not be triggered by thejudgment information but, rather, may be carried out by control from theoutside (user) via the control input I/F 2015.

[0838] In addition, though in the above description the completion ofthe period of time of recording 2021 and the viewing and listeningstarting time according to the time shift reproduction are set at thesame time and the operation of time shift reproduction of the copyprohibited content and the operation of the erasure of the data thatform this copy prohibited content are interlocked, the invention is notnecessarily limited to this but, rather, the viewing and listeningstarting time may be set at an arbitrary time or viewing and listeningmay be carried out through a direct order to the recording andreproduction means 2012, without carrying out time setting, based oncontrol from the control input I/F 2015 as long as the viewing andlistening starting time is within the period of time of recording 2021(period of time 2024 c wherein the time shift reproduction can be set atany time). At this time in the case that a direct order of the timeshift reproduction to the recording and reproduction means 2012 is notcarried out within the period of time of recording 2021, it ispreferable for the recording and reproduction means 2012 to stop therecording operation (period of time 2021 a in FIG. 35). In addition, atthe same time, it is desirable to not accept a direct order even in thecase that the direct order for time shift reproduction is again carriedout.

[0839] In addition, in the case that the period of time of recording2021 has elapsed in the above operation, though it is described abovethat the recording and reproduction means 2012 erases the data recordedafter the broadcast starting time from the recording buffer 2014 whilecontinuing sequential recording of the MPEG stream that is inputted fromthe outside, this data may be rewritten into an unreproduciblecondition, and in addition to that, the data may be maintained in therecording buffer 2014.

[0840] (Thirteenth Embodiment)

[0841] A recording and reproduction apparatus according to thethirteenth embodiment of the present invention uses a ring buffer as arecording buffer for recording the copy prohibited content.

[0842]FIG. 36 is a configuration diagram of a recording and reproductionapparatus according to the present thirteenth embodiment of the presentinvention. In the figure, the same symbols are attached to the sameparts as, or corresponding parts to, those in FIG. 33, of which thedescriptions are omitted. In addition, the ring buffer 2044 is a meansof temporarily recording a constant amount of data by repeating theoverwrite recording in the same region.

[0843] The operation of the recording and reproduction apparatusaccording to the thirteenth embodiment of the present invention, whichhas a configuration as described above, is described as follows.

[0844] First, the operation wherein the judgment information detectionmeans 2010 refers to an MPEG program stream from the outside and therecording and reproduction means 2012 records the copy prohibitedcontent in the ring buffer 2044 is carried out in the same manner as inthe twelfth embodiment.

[0845] Next, the operation of recording in the ring buffer 2044 by therecording and reproduction means 2012 is described in detail. Asdescribed above, the ring buffer 2044 is a specific region on therecording means 2013 and carries out overwrite recording by returning tothe recording start position after a constant amount of data isrecorded. At this time, the size of the ring buffer 2044 may be set inadvance or may be set based on the detection information acquired fromthe judgment information detection means 2010 and, in either case, thesize of the ring buffer 2044 is set so that the entirety of the copyprohibited content, which becomes the object of recording, is notrecordable. For example, in the case that the broadcast time of the copyprohibited content is 120 minutes, the ring buffer 2044 is set to have acapacity corresponding to 90 minutes.

[0846] The recording and reproduction means 2012 starts the recording ofthe copy prohibited content in the ring buffer 2044 that is set asdescribed above.

[0847] Here, FIG. 37 is a time chart for describing the operation of therecording and reproduction apparatus according to the present thirteenthembodiment. In the following, in reference to FIG. 37, the operations ofthe recording and reproduction means 2012 and the ring buffer 2044according to the present thirteenth embodiment are described in detail.Here, as shown in the figure, the settings of each of the times and eachof the periods of time are the same as in the case of the twelfthembodiment, shown in FIG. 34.

[0848] First, at the time when a broadcast starts, the recording andreproduction means 2012 starts recording the data that forms the copyprohibited content in the ring buffer 2044. After the broadcast startingtime, the recording and reproduction means 2012 keeps sequentiallyrecording the data until the capacity set in the ring buffer 2044becomes full and does not carry out reproduction (period of time ofrecording 2051).

[0849] Next, after the period of time of recording 2051 has elapsedsince the broadcast starting time and the capacity set in the ringbuffer 2044 becomes full, the recording and reproduction means 2012returns the recording head (ring buffer pointer) to the recording startposition from the recording position at the point in time during theperiod of time of recording 2051 in the ring buffer 2044 so as to carryout a new overwrite recording of the data.

[0850] In addition, in this operational example, since the completion ofthe period of time of recording 2051 is the same as the starting time ofthe period of time of viewing and listening 2054 according to the timeshift reproduction, the recording and reproduction means 2012 carriesout an overwrite recording of the MPEG stream that is inputted from theoutside and, at the same time, starts the reproduction of the data,immediately before overwriting, that has been recorded since thebroadcast starting time. That is to say, the data that corresponds tothe first 30 minute portion 2052 a (content broadcast during the periodof time of the live broadcast 2050 a) from among the data that has beenrecorded during the period of time of recording 2051 is reproduced after90 minutes have elapsed since the broadcast starting time when viewingand listening starts according to the time shift reproduction and, then,is erased through overwrite recording.

[0851] Then, the recording and reproduction means 2012 continues thesequential recording of data until the time of broadcast completion and,at the same time, continues the data reproduction (period of time ofrecording and reproduction 2052 b).

[0852] Next, at the time when the broadcast is completed, the recordingand reproduction means 2012 stops overwrite recording of the data andimplements the reproduction of the data recorded in the ring buffer 2044until the completion time of the viewing and listening (period of timeof reproduction 2053).

[0853] Here, with respect to the above described operation, the datareproduced from the ring buffer 2044 may be once stored in the ringbuffer 2044 so as to be collectively erased after the completion time ofviewing and listening and it is desirable to erase the data immediatelyafter reproduction in order to prevent the situation wherein the dataremains stored in the recording medium 2013 in the case where the powerof the recording and reproduction apparatus is cut off due to anaccident.

[0854] In addition, in the case that a time shift reproduction is notcarried out after the starting time of viewing and listening, therecording and reproduction means 2012 erases the entirety of the datarecorded in the ring buffer 2044. Thereby, the copy prohibited contentcan be prevent from being reproduced in a form other than by timeshifting.

[0855] In addition, though in the above described operation, thecompletion of the period of time of recording 2051 and the starting timeof viewing and listening according to time shift reproduction are set atthe same time while the operation of the time shift reproduction of thecopy prohibited content and the operation of the overwrite recording ofthe data that form this copy prohibited content are interlocked, theinvention is not necessarily limited to this and as shown in FIG. 38 thestarting time of viewing and listening may be set at an arbitrary timeor viewing and listening may be carried out according to a direct orderto the recording and reproduction means 2012, without a setting of thetime, based on the control from the control input I/F 2015 as long asthe starting time of viewing and listening is within the period of timeof recording 2061 (period of time 2064 c wherein time shift reproductioncan be set at an arbitrary time). At this time, in the case that thedirect order for time shift reproduction to the recording andreproduction means 2012 is not carried out within the period of time ofrecording 2061, it is preferable for the recording and reproductionmeans 2012 to stop the recording operation (period of time 2061 a in thefigure) In addition, at the same time, it is desirable to set the systemso that even in the case that the direct order for time shiftreproduction is carried out again, this direct order is not accepted.

[0856] In addition, though in the above described operation in the casethat the period of time of recording 2061 has passed, the recording andreproduction means 2012 continues the sequential recording of the MPEGstream that is inputted from the outside while erasing the data recordedafter the broadcast starting time from the ring buffer 2014, the datamay be stored in the recording buffer 2014 after this data is rewrittento an unreproducible condition.

[0857] In addition, as for the recording position of the data in thering buffer at the time when the data is reproduced in the time shiftreproduction according to the present embodiment (1) the reproductionposition under the condition wherein overwrite recording is not carriedout in the ring buffer 2044 becomes the same position wherein therecording has started in the ring buffer 2044 and (2) the reproductionposition under the condition wherein overwrite recording is beingcarried out becomes located immediately after the position at the pointin time when the control of the reproduction operation is carried out(position wherein the last overwrite recording is carried out) in thering buffer 2044. That is to say, according to the time shiftreproduction, read out is performed in the order starting from theoldest data recorded in the ring buffer 2044 in either of the abovecases (1) or (2). In the example shown in FIG. 38, the above (1)corresponds to the case wherein the time shift reproduction is carriedout within the period of time 2064 d (30 minutes after the broadcaststarting time) and the reproduction start position is always determineduniquely to be point A in the figure. The above (2) corresponds to thecase wherein the time shift reproduction is carried out within theperiod of time 2064 e (from 30 minutes to 60 minutes after the broadcaststarting time) and the reproduction start position corresponds to thepresent position of the recording head (buffer pointer) of the ringbuffer during the period of time 2064 e.

[0858] (Fourteenth Embodiment)

[0859] A recording and reproduction apparatus according to thefourteenth embodiment of the present invention can selectively carry outtime shift reproduction of only the copy prohibited content in the casethat a broadcast wherein copy prohibited content and content that may becopied are mixed is received.

[0860] Since the configuration of the present embodiment is the same asin the twelfth embodiment, FIG. 33 is referred to for description. Inaddition, FIG. 39 is a diagram for describing the operation of therecording and reproduction apparatus according to the presentembodiment. Here, in the present embodiment the period of time when timeshifting is possible is assumed to be set at 120 minutes instead of at90 minutes as in the above described embodiment. In the following, theoperation in the embodiment of the present invention is described inreference to FIG. 39.

[0861] In the MPEG stream 2070 that is inputted from the outside, copyprohibited content 2070 a and 2070 c that is prohibited from beingcopied and conventional content 2070 b and 2070 d that may be copied aremixed and the copy prohibited content 2070 a, 2070 b, copy prohibitedcontent 2070 c, 2070 d are inputted to the recording and reproductionapparatus in chronological order. The judgment information detectionmeans 2010 acquires judgment information included in the respectivecontent, which is outputted to the recording and reproduction means2012, while the time information acquisition means outputs timeinformation of respective content to the recording and reproductionmeans 2012. Based on the se, the recording and reproduction means 2012that has acquired the judgment information and the time informationtemporarily records the copy prohibited content in the recording buffer2014 and records the conventional content in the recording region withinthe recording medium 2013, other than within the recording buffer, afterthe broadcast time of respective content has elapsed.

[0862] At this time, the input of content is in chronological order and,therefore, as shown in FIG. 39, copy prohibited content 2070 a isrecorded first and copy prohibited content 2070 c is recorded second inthe recording buffer 2014 while content 2070 b is recorded first andcontent 2070 d is recorded second in the recording medium 2013.

[0863] Copy prohibited content 2070 a and 2070 c that have been recordedwithin the recording buffer 2014 are sequentially reproduced in a timeshift manner in the same manner as in the twelfth embodiment. After thecompletion of the time shift reproduction, data is deleted from therecording buffer 2014 or data is converted to the condition whereinreproduction is made impossible while the content 2070 b and 2070 drecorded in the recording medium 2013 can be permanently recorded.

[0864] Here, though in the above description the present embodiment canbe implemented in the recording and reproduction apparatus that has aconfiguration of the twelfth embodiment, it can also be implemented inthe same manner even in the case that it has the configuration of thethirteenth embodiment.

[0865] (Fifteenth Embodiment)

[0866] A recording and reproduction apparatus according to the fifteenthembodiment of the present invention encrypts the data of the copyprohibited content that is temporarily recorded so that the data isconverted to the condition that makes viewing and listening impossible.

[0867]FIG. 40 is a configuration diagram of a data concealment means2080 used in the recording and reproduction apparatus according to thefifteenth embodiment of the present invention. As shown in the figure, arecording buffer 2014 is the same means as the recording buffer of thetwelfth embodiment, an encryption means 2081 is a means of encryptingthe data inputted from the recording and reproduction means 2012 byusing a time variation key, a decryption means 2082 is a means ofdecrypting the encrypted data outputted from the recording buffer 2014,a time variation key generation means 2083 is a means of generating atime variation key used for the encryption means 2081 and the decryptionmeans 2082 and a key buffer 2084 is a means of temporarily storing thetime variation key.

[0868] The operation in the present embodiment having the abovedescribed configuration is described below when data is inputted fromthe recording and reproduction means 2012 to the encryption means 2081,the encryption means 2081 encrypts the original data based on the timevariation key generated by the time variation key generation means 2083.The encrypted data is recorded in the recording buffer 2014.

[0869] On the other hand, the time variation key generation means 83outputs the time variation key, which is the same as the one that theencryption means 2081 has acquired, to the key buffer 2084 and the keybuffer 2084 holds this.

[0870] Next, when the recording and reproduction means 2012 carries outtime shift reproduction and the encrypted data is outputted from therecording buffer to the encryption means 2082, the decryption meansacquires data necessary for the decrypting of the data from the keybuffer 2084 so as to decrypt this data.

[0871] In the above described operation, the key buffer that temporarilystores the time variation key disappears when the data exceeds an amountthat is equal to the amount of time corresponding to the data capacityof the recording buffer 2014. Thereby, the data on which time shiftreproduction is not carried out is held within the recording buffer 2014in an encrypted form and it becomes impossible to view and listen to thedata even if it is possible to reproduce the data.

[0872] In order to make the time variation key disappear, the key buffer2084 is made to have, for example, a ring buffer configuration so thatthe keys accumulated in the key buffer are overwritten by a new key. Inthe operational example of the twelfth embodiment shown in FIG. 34, forexample, the capacity of the ring buffer is the same as for the periodof time of recording 2021.

[0873] In addition, a timer is separately provided so that a period oftime is measured and the keys stored after the set time are sequentiallyerased from the key buffer 2084 after a predetermined period of time haselapsed.

[0874] In addition, in the case that the key buffer 2084 is formed of avolatile memory, all of the keys within the buffer are erased when thepower of the recording and reproduction apparatus is turned off and,thereby, secure concealment becomes possible.

[0875] (Sixteenth Embodiment)

[0876] A recording and reproduction apparatus according to the sixteenthembodiment of the present invention can make a notification to the userof the timing of the time shift reproduction.

[0877]FIG. 41 is a configuration diagram of the recording andreproduction apparatus according to the sixteenth embodiment of thepresent invention. In the figure, the same symbols are attached to thesame, or corresponding, parts as in FIG. 33, of which the descriptionsare omitted. In addition, a notification means 2091 is a means of makinga notification of the operational condition of this recording andreproduction apparatus through sound, image or letter information.

[0878] In addition, FIG. 42 is a diagram for describing the operation ofthe recording and reproduction apparatus according to the presentembodiment. The operation of the recording and reproduction apparatusaccording to the sixteenth embodiment of the present invention that hasthe above described configuration is described in the following. Here,the capacity set in the recording buffer 2014 corresponds to 90 minutesof broadcast time in the same manner as in the twelfth embodiment andthe descriptions of the operations that overlap those in the twelfthembodiment are omitted so that only the points of difference aredescribed.

[0879] First, the case is considered wherein the user is viewing andlistening to copy prohibited content broadcast from the broadcaststation as a live broadcast and the viewing and listening temporarilyinterrupted at time t for some reason. At this time, the user inputscommands via the control input I/F 2015 so as to start up the recordingand reproduction means 2012. Recording and reproduction means 2012starts recording the copy prohibited content in the recording buffer2014 at a point in time (same as time t1) when the input from thecontrol input I/F 2015 is received. Meanwhile, the recording andreproduction apparatus converts to the “pause” condition.

[0880] The data of the copy prohibited content is recorded in therecording buffer 2014 in the same manner as in the operation of twelfthembodiment and when it becomes time t2, an alarm sound is issued to theuser so as to draw the users attention that the y must control therecording and reproduction apparatus. In the present embodiment time t2is set at a time when the remaining amount of time (broadcast time unit)has elapsed after the recording time t1 during which the data recordedin the recording buffer 2014 by the recording and reproduction means2012 has reached the set capacity and that is 5 minutes (broadcast timeunits) in the present embodiment. Accordingly, time t2 completelybecomes the (recording starting (pause starting) time+85 minutes (amountof copy prohibited content that is temporarily recorded in the recordingbuffer−5 minutes).

[0881] Due to the notification from the notification means 2091, theuser inputs commands via the control input I/F 2015 so as to release thepause and to restart the viewing and listening of the copy prohibitedcontent. The point that differs from the condition before the pause isthe copy prohibited content that the user is viewing and listening to isreproduced in a time shift manner from the recording buffer 2014 insteadof being the live broadcast from the broadcast station.

[0882] In this case, the pause is effectuated from time t2 to time t1and the user's program viewing and listening completion time t6 isbehind the completion time t4 of the actual broadcast by (t2−t1)minutes.

[0883] In addition, when a time shift reproduction is carried out inthis operation starting from time t2, reproduction of the content thatis temporarily recorded in the recording buffer 2014 is completed whilethe program is being broadcast from the broadcast station and during aperiod of time from this reproduction completion time t7 to the programviewing and listening completion time t6, data is recorded in andreproduced from the recording buffer 2014 and, at the same time, thereproduced program data is held in the recording buffer in the conditionwherein viewing and listening is impossible or is erased.

[0884] On the other hand, in the case that the user does not input anycommand into the control input I/F 2015 after time t2 has passed, attime t3 when the data for the set time is completely recorded in therecording buffer 2014, the operation of temporarily recording data inthe recording buffer 2014 is stopped and the time shift reproduction isforcibly started. In the present embodiment, time t3 corresponds to thistime, which is 5 minutes after time t2, wherein time t2 is the time whenthe notification means 2091 makes a notification. In this operation, theprogram is reproduced in a time shift manner with a delay of the gapbetween time t3 and time t1, which is the time when pause is started, sothat time t5, which is the time when the viewing and listening to theprogram by the user is completed, is behind time t4, which is the timewhen the actual broadcast is completed, by (t3-t1) minutes. In addition,the (t3-t1) minutes is the same length of time as of the recording timeof the copy prohibited content that is set in the recording buffer 2014at the beginning. Furthermore, the broadcast after time t3 is notrecorded in the recording buffer 2014. Accordingly, during a period oftime between time t8, which is the time when the time shift reproductionis forcibly completed, and time t5, which is the program viewing andlistening completion time, the user views and listens to another programthat is broadcast after the broadcast of the previous program hasalready been completed or time t8 that is the time when the time shiftreproduction is completed exactly becomes the user's viewing andlistening completion time.

[0885] That is to say, in the case that the time shift reproduction isonce forcibly started without the input of the command for the timeshift reproduction by the user after time t2 has passed, the user cannotview or listen to the program, which had been being viewed and listenedto before the pause, in a complete form after the pause is released.

[0886] As described above according to the present embodiment, the usercan set the time shift reproduction of the copy prohibited content to adesired time and the user can be encouraged to complete theimplementation of the time shift reproduction before a predeterminedperiod has elapsed in order to protect the copyright of the copyprohibited content.

[0887] Here, though in the above described embodiment, an example usingthe recording buffer 2014 is described, the same effect can be gained byusing the ring buffer 2044 of the thirteenth embodiment in place of therecording buffer 2014. As for the operation of the case wherein the ringbuffer 2044 is used, the time shift reproduction for the set period oftime in the recording buffer that a ring buffer is carried out whereinthe reproduction is simultaneously carried out as recording of data inan overwriting manner is continued between time t4 and time t3 as shownby the one dotted chain line in FIG. 42. Here, the operation of the casewherein the overwriting operation is set to be prohibited at time t3becomes the same as the case of a forcible time shift reproductionimplementation of the above described ordinal recording buffer.

[0888] In addition, the configuration of the embodiment may be used bybeing combined with that of the fourteenth embodiment, which has alreadybeen described.

[0889] Furthermore, though in each of the above described embodiments arecording and reproduction means wherein a recording apparatus and areproduction means are integrated according to the present invention isdescribed as carrying out recording in, and reproduction from, arecording buffer, the configuration of the present invention is notlimited to this but, rather, may be provided with only a recording meansthat carries out recording and a means of reproducing data from therecording buffer 2014 or the ring buffer 2044 may be separately providedas an external apparatus.

[0890] Furthermore, though in each of the above described embodimentsthe period of time of recording of the copy prohibited content, or thelike, is measured as time information by counting the PCR packets withinthe MPEG stream of the content, time information is not limited to thisbut, rather, EPG may be used as another type of time information and thetime information may be measured in reference to the acquired EPG bycarrying out an absolute time measurement by means of a timer providedseparately.

[0891] Furthermore, this time information may be measured in therecording medium 2013.

[0892] Furthermore, this time information may be measured within adevice such as an STB that inputs an MPEG stream to the recording andreproduction apparatus according to the embodiment of the presentinvention and may be inputted together with the MPEG stream.Furthermore, these types of time information may include the broadcaststarting time, and the like, of the content that becomes the object oftemporary recording.

[0893] Furthermore, though in each of the above described embodimentscopy prohibited content is described as comprising data that is notpermitted, even one time, to be copied, copy prohibited content of thepresent invention is not limited to this but, rather, content thatcomprises data that is allowed to be copied only one time may be theobject of the invention. In summary, it is possible for the presentinvention to use any data, as long as it is prohibited from being copiedor predetermined restrictions are applied to it.

[0894] Here, the present specification also describes an inventionconcerning a reproduction apparatus characterized by comprising: acontrol means of controlling the encrypted data, which is recorded on adisk by the above described recording apparatus of the presentinvention, to be reproduced; a reproduction means controlled by saidcontrol means of reproducing said data and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said control means controls said recording means to reproducesaid copy permission information; wherein said decryption meansgenerates first information that includes at least either of said deviceunique key or said copy permission information; wherein said decryptionmeans uses said recording unit information and generates a content keythat is information gained by decrypting said first information; andwherein said decryption means decrypts said data by using said contentkey.

[0895] Furthermore, the present specification also describes aninvention concerning a reproduction apparatus characterized bycomprising: a control means of controlling the encrypted data, which isrecorded on a disk by the above described recording apparatus of thepresent invention, to be reproduced; a reproduction means controlled bysaid control means of reproducing said data; and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said control means controls said recording means to reproducesaid encrypted title key; and wherein said decryption means decryptssaid encrypted title key by using said device unique key.

[0896] Furthermore, the present specification describes an inventionconcerning a reproduction apparatus characterized by comprising: acontrol means of controlling the encrypted data, which is recorded on adisk by the above described recording apparatus of the presentinvention, to be reproduced; a reproduction means controlled by saidcontrol means of reproducing said data; and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said decryption means decrypts said data by using said titlekey.

[0897] Furthermore, the present specification describes an inventionconcerning a reproduction apparatus characterized by comprising; acontrol means of controlling the encrypted data, which is recorded on adisk by the above described recording apparatus of the presentinvention, to be reproduced; a reproduction means controlled by saidcontrol means of reproducing said data; and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said control means controls said recording means to reproducesaid encrypted title key; wherein said decryption means decrypts saidreproduced title key by using said device unique key; said decryptionmeans generates third information that includes said title key; whereinsaid decryption means generates a content key that is information gainedby decrypting said third information by using recording unit informationthat is a numeral and/or a symbol specific to the recording block baseDon a recording unit that is the minimum unit for said control means tosequentially access said recording means; and wherein said decryptionmeans decrypts said data by using said content key.

[0898] Furthermore, the present specification also describes aninvention concerning a reproduction apparatus characterized bycomprising: a control means of controlling the encrypted data, which isrecorded on a disk by the above described recording apparatus of thepresent invention, to be reproduced; a reproduction means controlled bysaid control means of reproducing said data; and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said decryption means decrypts said data by using said copypermission information.

[0899] Furthermore, the present specification describes an inventionconcerning a reproduction apparatus characterized by comprising; acontrol means of controlling the encrypted data, which is recorded on adisk by the above described recording apparatus of the presentinvention, to be reproduced; a reproduction means controlled by saidcontrol means of reproducing said data; and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said control means controls said recording means to reproducesaid encrypted title key; wherein said decryption means decrypts saidreproduced title key by using said device unique key; wherein saidcontrol means controls said recording means to reproduce said copypermission information; wherein said decryption means generates secondinformation that includes at least either said title key or said copypermission information; wherein said decryption means generates acontent key that is information gained by decrypting said secondinformation by using recording unit information that is a numeral and/ora symbol specific to a recording block corresponding to a recording unitthat is the minimum unit for said control means to sequentially accesssaid recording means; and wherein said decryption means decrypts saiddata by using said content key.

[0900] Furthermore, the present specification describes an inventionconcerning a reproduction apparatus characterized by comprising; acontrol means of controlling the encrypted data, which is recorded on adisk by the above described recording apparatus of the presentinvention, to be reproduced; a reproduction means controlled by saidcontrol means of reproducing said data; and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said control means controls said recording means to reproducesaid copy permission information; and wherein said decryption meansdecrypts said data by using said reproduced copy permission information.

[0901] Furthermore, the present specification also describes aninvention concerning a medium that holds a program and/or data forallowing a computer to implement the entirety of, or a part of, thefunctions of the entirety of, or a part of, the above described presentinvention, wherein said functions are implemented by said program and/ordata, which is readable or has been read out by the computer, working incooperation with said computer.

[0902] Furthermore, the present specification also describes aninvention concerning an information assembly that is a program and/ordata for allowing a computer to implement the entirety of, or a part of,the functions of the entirety of, or a part of, the above describedpresent invention, wherein said functions are implemented by saidprogram and/or data, which is readable or has been read out by thecomputer, working in cooperation with said computer.

[0903] Furthermore, data includes data structure, data format, datatypes, and the like.

[0904] Furthermore, a medium includes a recording medium such as a ROM,a transmission medium such as the Internet and a transmission mediumsuch as light, radio waves and sound waves.

[0905] Furthermore, a medium that holds a program and/or data includes,for example, a recording medium in which a program and/or data isrecorded, a transmission medium for transmitting a program and/or data,and the like.

[0906] Furthermore, to be able to be processed by a computer includes,for example, to be readable by a computer in the case of a recordingmedium such as a ROM and includes that a program and/or data thatbecomes the object of transmission is able to be handled by a computeras a result of transmission.

[0907] Furthermore, an information assembly includes software such as,for example, a program and/or data.

[0908] Furthermore, as described above, the configuration of the presentinvention may be implemented in a software manner or may be implementedin a hardware manner.

[0909] Industrial Applicability

[0910] As is clear from the above description, the present invention canprovide a recording apparatus and a reproduction apparatus that canprotect copyrights in the case that data that requires copyrightprotection is recorded and/or in the case that data that requirescopyright protection is reproduced.

[0911] In addition, the present invention can provide a data processingapparatus that protects the copyright when shifting data that isprohibited from being copied to, or when copying data that is prohibitedfrom being copied in, another recording medium, a recording andreproduction apparatus for recording, or for reproducing whilerecording, the data from this data processing apparatus, an encrypteddata decrypting and recording apparatus system for backing up data whileprotecting the copyright as well as a decrypting and recordingapparatus, a recording apparatus and data transmission apparatus fortransmitting data while protecting the copyright.

[0912] In addition, the present invention can provide a recordingapparatus and a recording and reproduction apparatus that can carry outa time shift reproduction of a broadcast program, and the like, that isprohibited from being copied in a manner such that infringement of thecopyright is avoided.

What is claimed is:
 1. A recording apparatus characterized bycomprising: an encryption means of encrypting data sent from aninterface; a control means of controlling said encrypted data to berecorded; and a recording means controlled by said control means ofrecording said encrypted data on a disk.
 2. A recording apparatusaccording to claim 1, characterized in that said encryption meansencrypts said data by using a device unique key that is a numeric valueand/or a symbol allocated to, and specific to, said recording apparatus.3. A recording apparatus according to claim 1 or 2, characterized inthat said encryption means encrypts said data by using recording unitinformation that is a numeral and/or a symbol specific to a recordingblock corresponding to a recording unit that is a minimum unit for saidcontrol means to sequentially access said recording means.
 4. Arecording apparatus according to claim 3, characterized in that theencryption of said data by using said recording unit informationindicates the encryption of said data by using a key gained based onsaid recording unit information.
 5. A recording apparatus according toclaim 3 or 4, characterized in that at least said encrypted datarecorded in said recording block and additional information added tosaid encrypted data are encrypted in the entire portion and are recordedin said recording means.
 6. A recording apparatus according to any ofclaims 3 to 5, characterized in that: copy permission information isadded to said data; said control means controls said recording means torecord said copy permission information; said encryption means generatesfirst information that includes at least either said device unique keyor said copy permission information; said encryption means generates, byusing said recording unit information, a content key that is informationgained by encrypting said first information; said encryption meansencrypts said data by using said content key; and said control meanscontrols said recording means to record said encrypted data.
 7. Arecording apparatus according to claim 2, characterized in that: a titlekey that is a numeric value and/or a symbol specific to said data isallocated to said data; said encryption means encrypts said title key byusing said device unique key; and said control means controls saidrecording means so that said encrypted title key is recorded in saidrecording means.
 8. A recording apparatus according to claim 7,characterized in that said encryption means encrypts said data by usingsaid title key.
 9. A recording apparatus according to claim 8,characterized in that: said encryption means encrypts said title key byusing said device unique key; said control means controls said recordingmeans to record said encrypted title key; said encryption meansgenerates third information that includes said title key; saidencryption means generates a content key, which is information gained byencrypting said third information, by using recording unit informationthat is a numeral and/or a symbol specific to a recording block based ona recording unit that is a minimum unit for said control means tosequentially access said recording means; said encryption means encryptssaid data by using said content key; and said control means controlssaid recording means to record said encrypted data.
 10. A recordingapparatus according to claim 8, characterized in that: copy permissioninformation is added to said data; and said encryption means encryptssaid data by using said copy permission information.
 11. A recordingapparatus according to claim 10, characterized in that: said encryptionmeans encrypts said title key by using said device unique key: saidcontrol means controls said recording means to record said encryptedtitle key; said control means controls said recording means to recordsaid copy permission information; said encryption means generates secondinformation that includes at least either the said title key or saidcopy permission information; said encryption means generates a contentkey that is information gained by encrypting said second information byusing recording unit information that is a numeral and/or a symbolspecific to a recording block based on a recording unit that is aminimum unit for said control means to sequentially access saidrecording means; said encryption means encrypts said data by using saidcontent key; and said control means controls said recording means torecord said encrypted data.
 12. A recording apparatus according to claim1, characterized in that: said encryption means encrypts data sent fromthe interface to which copy permission information is attached by usingsaid copy permission information; and said control means controls saidrecording means to record said copy permission information before and/orafter said recording means records said data.
 13. A recording apparatusaccording to claim 12, characterized in that said control means controlssaid recording means to record said copy permission information before,at least, said recording means records said data.
 14. A recordingapparatus according to claim 12, characterized in that said controlmeans controls said recording means to record said copy permissioninformation only after said recording means records said data.
 15. Arecording apparatus characterized by comprising: a control means ofcontrolling encrypted data sent from an interface to be recorded; and arecording means, that is controlled by said control means, of recordingsaid encrypted data on a disk.
 16. A reproduction apparatuscharacterized by comprising: a control means of controlling encrypteddata recorded on a disk by means of a recording apparatus according toclaim 1 to be reproduced; a reproduction means, which is controlled bysaid control means, of reproducing said data; and a decryption means ofdecrypting said reproduced data that is sent to the interface.
 17. Areproduction apparatus characterized by comprising: a control means ofcontrolling encrypted data recorded on a disk by means of a recordingapparatus according to claim 2 to be reproduced; a reproduction means,that is controlled by said control means, of reproducing said data; anda decryption means of decrypting said reproduced data that is sent tothe interface, wherein said decryption means decrypts said reproduceddata by using said device unique key.
 18. A reproduction apparatuscharacterized by comprising: a control means of controlling encrypteddata recorded on a disk by means of a recording apparatus according toclaim 3 to be reproduced; a reproduction means, that is controlled bysaid control means, of reproducing said data; and a decryption means ofdecrypting said reproduced data that is sent to the interface, whereinsaid decryption means decrypts said reproduced data by using saidrecording unit information.
 19. A reproduction apparatus characterizedby comprising: a control means of controlling encrypted data recorded ona disk by means of a recording apparatus according to claim 4 to bereproduced; a reproduction means, that is controlled by said controlmeans, of reproducing said data; and a decryption means of decryptingsaid reproduced data that is sent to the interface, wherein saiddecryption means decrypts said reproduced data by using a key gainedbased on said recording unit information.
 20. A reproduction apparatuscharacterized by comprising: a control means of controlling encrypteddata recorded on a disk by means of a recording apparatus according toclaim 14 to be reproduced; a reproduction means, which is controlled bysaid control means, of reproducing said data; and a decryption means ofdecrypting said reproduced data that is sent to the interface, whereinsaid decryption means attempts to decrypt the entirety of, or a portionof said encrypted data by assuming that said copy permission informationhas a variety of values in the case that said copy permissioninformation cannot be recorded in a normal manner in said recordingmeans at the time when said data is recorded, and wherein saidreproduced data is decrypted by using the value of said copy permissioninformation in the case that said reproduced data can be decrypted in anormal manner as a result of said attempts.
 21. A reproduction apparatuscharacterized by comprising: a control means of controlling encrypteddata recorded on a disk by means of a recording apparatus according toclaim 15; and a reproduction means, which is controlled by said controlmeans, of reproducing said data, wherein said reproduced data is sent tothe interface.
 22. A recording apparatus according to any of claims 1 to14, characterized in that said interface, said encryption means and saidcontrol means are integrated and provided on the same printed circuitboard.
 23. A recording apparatus according to claim 22, characterized inthat said interface, said encryption means and said control means areintegrated in one chip.
 24. A reproduction apparatus according to any ofclaims 16 to 20, characterized in that said interface, said decryptionmeans and said control means are integrated and provided on the sameprinted circuit board.
 25. A reproduction apparatus according to claim24, characterized in that said interface, said decryption means and saidcontrol means are integrated in one chip.
 26. A recording apparatusaccording to claim 22, characterized in that a signal detected from aterminal on said printed circuit board that outputs a signal that can bereproduced as data by a third party is entirely encrypted and/or isinscribed in an undisclosed format.
 27. A reproduction apparatusaccording to claim 24, characterized in that a signal detected from aterminal on said printed circuit board that outputs a signal that can bereproduced as data by a third party is entirely encrypted and/or isinscribed in an undisclosed format.
 28. A recording apparatus accordingto claim 22, characterized in that the property of a terminal on saidprinted circuit board that outputs a signal that can be reproduced asdata by a third party is defined according to an undisclosed format. 29.A reproduction apparatus according to claim 24, characterized in thatthe property of a terminal on said printed circuit board that outputs asignal that can be reproduced as data by a third party is definedaccording to an undisclosed format.
 30. A recording apparatus accordingto any of claims 2 to 11, characterized in that said device unique keycannot be accessed by an external device.
 31. A recording apparatusaccording to any of claims 6, 10, 11, 12, 13 and 14, characterized inthat said copy permission information is recorded in a system regionthat cannot be directly accessed by a user of said recording means. 32.A recording apparatus according to any of claims 1 to 15, 22, 23, 26,28, 30 and 31, characterized in that: copy permission information isadded to the data sent from said interface; and said control means cancontrol said recording means to record said data even in the case thatsaid copy permission information of said data represents “Copy Never”according to a predetermined condition.
 33. A recording apparatusaccording to claim 32, characterized in that said predeterminedcondition is the case wherein said recorded data becomes unreproducibleafter a predetermined period of time.
 34. A recording apparatusaccording to claim 32, characterized in that said predeterminedcondition is the case wherein said recorded data becomes unreproducibleaccording to fee imposition conditions.
 35. A reproduction apparatusaccording to any of claims 16 to 21, 24, 25, 27 and 29, characterized inthat: copy permission information is added to said encrypted data thatis recorded: and said control means controls said reproduction means toreproduce said data at least one time in the case that said copypermission information of said data represents “Copy Never” according toa predetermined condition.
 36. A reproduction apparatus according toclaim 35, characterized in that said predetermined condition is the casewherein said recorded data becomes unreproducible after a predeterminedperiod of time.
 37. A reproduction apparatus according to claim 35,characterized in that said predetermined condition is the case whereinsaid recorded data becomes unreproducible according of fee impositionconditions.
 38. A reproduction apparatus according to any of claims 16to 21, 24, 25, 27 and 29, characterized in that: copy permissioninformation is added to said encrypted data that is recorded; and saidcontrol means controls said reproduction means to copy and to outputsaid data only once so as to allow said copy permission information ofsaid data, after being once copied by means of said recording means, topermit copying only one additional time (copy once) in the case thatsaid copy permission information of said data represents the permissionof copying only one (copy once) according to a predetermined condition.39. A reproduction apparatus according to claim 38, characterized inthat said predetermined condition is the case wherein said data or thekey used for encrypting said data are erased after a predeterminedperiod of time has elapsed since said reproduction means has copied andoutputted said data.
 40. A reproduction apparatus according to claim 38,characterized in that said predetermined condition is the case wherein arecorder of said data that has been only once copied and outputted is anapparatus for recording said data as a backup.
 41. A reproductionapparatus according to claim 40, characterized in that said datarecorded as a backup in said recorder is unreproducible from saidrecorder.
 42. A reproduction apparatus according to claim 40,characterized in that said data recorded as a backup in said recorder isunreproducible unless said data is returned to the original reproductionapparatus.
 43. A recording apparatus according to any of claims 1 to 14,22, 23, 26 and 30 to 34 characterized in that said encryption meansencrypts data regardless of the value of the copy permission informationof said data sent from said interface.
 44. A recording apparatusaccording to any of claims 1 to 14, 22, 23, 26 and 30 to 34characterized in that: said encryption means does not encrypt said datain the case that copy permission information of the data sent from saidinterface represents that the data can be freely copied (copy free); andsaid control means controls said recording means to record saidunencrypted data.
 45. A data processing apparatus comprising at least amove means of moving data that is recorded in a recording medium forrecording data to another recording apparatus, characterized in that, inthe case that data that is attempted to be moved by said move means iscopy prohibited data prohibited from being copied, the copy prohibiteddata is encrypted by using an encryption key specific to said dataprocessing apparatus when at least being outputted from said dataprocessing apparatus.
 46. A data processing apparatus comprising atleast a copying means of copying data that is recorded on a recordingmedium for recording data into another recording apparatus,characterized in that, in the case that data that is attempted to becopied by said copying means is copy permission information that isprohibited from being copied, the copy prohibited data is encrypted byusing an encryption key specific to said data processing apparatus whenat least being outputted from said data processing apparatus.
 47. A dataprocessing apparatus according to claim 45 or 46, characterized byfurther comprising an encryption means of encrypting said copyprohibited data by using said encryption key.
 48. A data processingapparatus according to any of claims 45 to 47, characterized by furthercomprising a reproduction means of decryption, by using said encryptionkey, said copy prohibited data encrypted using said encryption key andof reproducing said copy prohibited data.
 49. A data processingapparatus according to claim 48, characterized in that: saidreproduction means is a means of reproducing said copy prohibited dataat a rate required at the time of viewing and listening by the user; astorage means of storing said copy prohibited data that has beentransmitted at a rate faster than said rate that is required at the timeof viewing and listening by the user in the case that said copyprohibited data encrypted using said encryption key is transmitted at arate faster than said rate required at the time of viewing and listeningby the user from said other recording apparatus is provided; and saidreproduction means can reproduce said copy prohibited data stored insaid storage means or data stored in said storage means in advance atthe time when said storage means stores said copy prohibited data fromsaid other recording apparatus.
 50. A data processing apparatusaccording to any of claims 45 to 49, characterized in that: said otherrecording apparatus is an apparatus that can record data in a secondrecording medium; a judgment means of judging whether or not said secondrecording medium is a recording medium corresponding to said dataprocessing apparatus is further provided; and said move means or saidcopying means moves or copies said copy prohibited data in the case thatsaid second recording medium is judged to be a recording mediumcorresponding to said data processing apparatus by said judgment means.51. A data processing apparatus according to any of claims 45 to 49,characterized in that: said other recording apparatus is an apparatusthat can record data in a second recording medium; a judgment means ofjudging whether or not said other recording apparatus is an apparatuscorresponding to said data processing apparatus is further provided; andsaid move means or said copying means moves or copies said copyprohibited data in the case that said other recording apparatus is anapparatus corresponding to said data processing apparatus by saidjudgment means.
 52. A data processing apparatus according to any ofclaims 45 to 51, characterized in that said move means or said copyingmeans outputs said copy prohibited data as data that can be copied onlyonce when said copy prohibited data is moved or is copied.
 53. Arecording and reproduction apparatus, characterized by comprising arecording means of recording said copy prohibited data that is encryptedusing said encryption key from a data processing apparatus according toany of claims 45 to 47 in a second recording medium.
 54. A recording andreproduction apparatus, characterized by comprising: a recording meansof recording said copy prohibited data that is encrypted using saidencryption key from a date processing apparatus according to claim 48 ina second recording medium; and a transmission means of transmitting saidcopy prohibited data that is recorded in said second recording mediumand that is encrypted using said encryption key to said data processingapparatus while still encrypted using said encryption key.
 55. Arecording and reproduction apparatus, characterized by comprising: arecording means of recording said copy prohibited data that is encryptedusing said encryption key from a data processing apparatus according toclaim 50 or 51 in said second recording medium; and a transmission meansof transmitting said copy prohibited data that is recorded in saidsecond recording medium and that is encrypted using said encryption keyto said data processing apparatus while still encrypted using saidencryption key.
 56. A recording and reproduction apparatus,characterized by comprising: a recording means of recording said copyprohibited data encrypted using said encryption key from a dataprocessing apparatus according to any of claims 45, 46, 47, 50 and 51 ina second recording medium; and a decryption and reproduction means ofdecrypting, by using said encryption key, said copy prohibited data thatis recorded in said second recording medium and that is encrypted usingsaid encryption key and of reproducing said copy prohibited data.
 57. Arecording and reproduction apparatus according to claim 56,characterized by further comprising: a key reproduction means ofreproducing an encrypted key recording medium wherein said encryptionkey is recorded; and a key storage means of storing said encryption keyreproduced by said key reproduction means, wherein said decryption andreproduction means reproduces said copy prohibited data by utilizingsaid encryption key stored by said key storage means.
 58. A recordingand reproduction apparatus according to claim 56, characterized byfurther comprising a reception means of receiving said encryption keythat is transmitted from said data processing apparatus, wherein saiddecryption and reproduction means reproduces said copy prohibited databy utilizing said encryption key received by said reception means.
 59. Adata processing apparatus, characterized by comprising at least a movemeans of moving data that is recorded in a recording medium forrecording data to another recording apparatus as data in a format thatcan be decrypted in the other recording apparatus, wherein data that isattempted to be moved by said move means is copy prohibited data that isprohibited from being copied.
 60. A data processing apparatus,characterized by comprising at least a copying means of copying datathat is recorded in a recording medium for recording data in anotherrecording apparatus as data in a format that can be decrypted in theother recording apparatus, wherein data that is attempted to be copiedby said copying means is copy prohibited data that is prohibited frombeing copied.
 61. A data processing apparatus according to claim 59 or60, characterized in that the data in a format that can be decrypted insaid other recording apparatus means plain sentence data, data that isencrypted using a key specific to said other recording apparatus or datathat is encrypted using a key attached to a second recording medium insaid other recording apparatus.
 62. A data processing apparatusaccording to claim 61, characterized in that the data in a format thatcan be decrypted in said other recording apparatus is also data in aformat used in said other recording apparatus.
 63. A data processingapparatus according to any of claims 59 to 62, characterized in that:said other recording apparatus is an apparatus that can record data insaid recording medium; a judgment means of judging whether or not saidsecond recording medium corresponds to said data processing apparatus isfurther provided; and said move means or said copying means moves orcopies said copy prohibited data in the case that said second recordingmedium is judged to be a recording medium corresponding to said dataprocessing apparatus according to said judgment means.
 64. A dataprocessing apparatus according to claim 63, characterized in that: saidjudgment means carries out said judgment by using said key in the casethat a key indicating that said second recording medium is a recordingmedium corresponding to said data processing apparatus is attached tosaid second recording medium; an encryption means of encrypting saidcopy prohibited data by using said key in the case that said secondrecording medium is judged to be a recording medium corresponding tosaid data processing apparatus by said judgment means is furtherprovided; and said move means or said copying means moves or copies saidencrypted copy prohibited data.
 65. A data processing apparatusaccording to any of claims 59 to 62, characterized in that: said otherrecording apparatus is an apparatus that can record data in a secondrecording medium; a judgment means of judging whether or not said otherrecording apparatus is an apparatus corresponding to said dataprocessing apparatus is further provided; and said move means or saidcopying means moves or copies said copy prohibited data in the case thatsaid other recording apparatus is judged to be an apparatuscorresponding to said data processing apparatus by said judgment means.66. A data processing apparatus according to claim 65, characterized inthat: in the case that said judgment means has a key that indicates thatsaid other recording apparatus is an apparatus corresponding to saiddata processing apparatus, said judgment means carries out said judgmentby using said key; an encryption means of encrypting said copyprohibited data by using said key, in the case that said other recordingapparatus is judged to be an apparatus corresponding to said dataprocessing apparatus by said judgment means, is further provided; andsaid move means or said copying means moves or copies said encryptedcopy prohibited data.
 67. A data processing apparatus according to anyof claims 59 to 66, characterized in that said move means or saidcopying means outputs said copy prohibited data as data that can becopied only once when said copy prohibited data is moved or copied. 68.A recording and reproduction apparatus for recording said copyprohibited data, from a data processing apparatus according to claim 59or 60, in a second recording medium and for reproducing said copyprohibited data from said second recording medium, wherein said copyprohibited data is plain sentence data, and wherein said recording andreproduction apparatus is characterized by comprising: an encryptionmeans of encrypting said copy prohibited data by using an encryption keyattached to said second recording medium or by using an encryption keyspecific to said recording and reproduction apparatus; a recording meansof recording said copy prohibited data encrypted by said encryptionmeans in said second recording medium; and a reproduction means ofdecrypting said encrypted copy prohibited data that is recorded in saidsecond recording medium by utilizing said key so as to reproduce saidcopy prohibited data.
 69. A recording and reproduction apparatus forrecording said copy prohibited data, from a data processing apparatusaccording to claim 59 or 60, in a second recording medium and forreproducing said copy prohibited data from said second recording medium,wherein said copy prohibited data is data encrypted by a key specific tosaid recording and reproduction apparatus or data encrypted by using akey attached to said second recording medium, wherein said recording andreproduction apparatus is characterized by comprising: a recording meansof recording said encrypted copy prohibited data in said secondrecording medium; and a reproduction means of decrypting said encryptedcopy prohibited data that is recorded in said second recording medium byutilizing said key so as to reproduce said copy prohibited data.
 70. Adata processing apparatus according to any of claims 45, 46, 47, 48, 49,50, 51, 52, 59, 60, 61, 62, 63, 64, 65, 66 and 67, characterized byfurther comprising a fee imposition information transmission means oftransmitting fee imposition information with respect to move or copyingof said data to a management apparatus for managing said data processingapparatus when said move means carries out the move of said data or whensaid copying means carries out the copying of said data.
 71. A dataprocessing apparatus according to any of claims 45, 46, 47, 48, 49, 50,51, 52, 59, 60, 61, 62, 63, 64, 65, 66 and 67, characterized in thatsaid move means moves said copy prohibited data to, or said copyingmeans copies said copy prohibited data into, said other recordingapparatus when at least a management apparatus, which has the ability ofimposing a fee on the move or on the copying of said copy prohibiteddata, is confirmed to be connected to an interface to which said dataprocessing apparatus and said other recording apparatus are connected.72. An encrypted data decrypting and recording apparatus systemcharacterized by comprising: a plurality of recording apparatuses thatrespectively record encrypted copy prohibited data, of which the contentis identical, that is prohibited from being copied; and a decrypting andrecording apparatus having a decryption means of decrypting saidencrypted copy prohibited data that is outputted from said plurality ofrecording apparatuses and a recording means of recording encrypted, orunencrypted, copy prohibited data, of which the content is identical tosaid copy prohibited data.
 73. A decrypting and recording apparatus,characterized by comprising: a decryption means of decrypting encryptedcopy prohibited data, which is prohibited from being copied and which isoutputted from a plurality of recording apparatuses in which saidencrypted copy prohibited data, of which the content is identical, isrespectively recorded; and a recording means of recording encrypted, orunencrypted, copy prohibited data, of which the content is identical tothat of said copy prohibited data.
 74. A recording apparatus,characterized by being one of a plurality of recording apparatuses thatrespectively record encrypted copy prohibited data, of which the contentis identical, that is prohibited from being copied, wherein saidrecording apparatus comprises a recording means of recording saidencrypted copy prohibited data and an output means of outputting saidencrypted copy prohibited data that is recorded in said recording means,and wherein said encrypted copy prohibited data outputted from saidoutput means is data that can only be decrypted in a decrypting andrecording apparatus having at least a decryption means of decryptingsaid encrypted copy prohibited data.
 75. A data transmission apparatuscharacterized by comprising a transmission means of transmitting astream formed of a plurality of pieces of data, wherein each of saidpieces of data in said stream, or within each of blocks forming saidstream, is data that cannot be reproduced unless the piece of datachronologically positioned one position before said data is reproduced,and wherein said transmission means transmits each piece of said data,of data in said stream, or each of the blocks forming said stream, inthe order of from the rear toward the head in a chronological manner.76. A recording apparatus for allowing copy restricted content,comprising data that is set so as to be prohibited from, or restrictedfrom, being copied, to become reproducible in a time shift manner,characterized by comprising: a recording medium wherein a predeterminedcapacity of recording of said copy restricted content is possible; and arecording means of recording data in said recording medium, wherein saidrecording means records said copy restricted content in said recordingmedium and allows data of said copy restricted content recorded in saidrecording medium to convert to the condition wherein viewing andlistening is impossible after a predetermined period of time has elapsedsince the time the recording of said copy restricted content hasstarted.
 77. A recording apparatus according to claim 76, characterizedin that said condition wherein viewing and listening is impossible isimplemented by erasing the data of said copy restricted content.
 78. Arecording apparatus according to claim 76, characterized in that saidcondition wherein viewing and listening is impossible is implemented bynot erasing the data of said copy restricted content.
 79. A recordingapparatus according to claim 76, characterized in that said conditionwherein viewing and listening is impossible is implemented by allowingthe data of said copy restricted content to become unreproducible.
 80. Arecording apparatus according to claim 79, characterized in that saidcondition wherein viewing and listening is impossible is implemented byencrypting the data of said copy restricted content after reproduction.81. A recording apparatus according to any of claims 76 to 80,characterized in that the timing according to which said recording meansstarts the recording of said copy restricted content is defined byreferring to judgment information in conjunction with said copyrestricted content.
 82. A recording apparatus according to claim 81,characterized in that said recording means carries out recording bydifferentiating said copy restricted content from other content by usingsaid judgment information.
 83. A recording apparatus according to claim81, characterized in that said judgment information is copyrightinformation included in a data column of said copy restricted content.84. A recording apparatus according to any of claims 76 to 82,characterized in that the timing according to which said recording meansstarts the recording of said copy restricted content is defined based onan input from the outside.
 85. A recording apparatus according to any ofclaims 76 to 80, characterized in that said recording medium has arecording buffer for temporarily recording said copy restricted content.86. A recording apparatus according to claim 85, characterized in thatsaid recording buffer is a ring buffer wherein it is possible to recorda constant amount of data by repeating overwriting recording in the sameregion.
 87. A recording and reproduction apparatus characterized bycomprising: a recording apparatus according to any of claims 76 to 85;and a reproduction means of reproducing data recorded in said recordingmedium, wherein said reproduction means reproduces said copy restrictedcontent that has been recorded after a predetermined period of standbytime has elapsed since the time of the start of the recording of saidcopy restricted content.
 88. A recording and reproduction apparatuscharacterized by comprising: a recording apparatus according to claim86; and a reproduction means of reproducing data recorded in saidrecording medium, wherein said reproduction means reproduces said copyrestricted content that has been recorded after a predetermined periodof standby time has elapsed since the time of the start of the recordingof said copy restricted content.
 89. A recording and reproductionapparatus according to claim 88, characterized in that, at the time whensaid reproduction means carries out a reproduction operation under thecondition wherein overwriting recording is being carried out in saidring buffer, the reproduction of said data is carried out starting fromthe position where the oldest piece of data is recorded in said ringbuffer.
 90. A recording and reproduction apparatus according to claim89, characterized in that, at the time when said reproduction meanscarries out a reproduction operation under the condition whereinoverwriting recording is not carried out in said ring buffer, thereproduction of said data is carried out starting from the recordingstart position on said ring buffer.
 91. A recording and reproductionapparatus according to claim 87 or 88, characterized in that, in thecase that copy restricted content recorded in said recording medium isnot reproduced within said predetermined period of standby time, saidrecording apparatus stops the recording operation of said copyrestricted content.
 92. A recording and reproduction apparatus accordingto claim 87 or 88, characterized by further comprising a notificationmeans of making a notification of operational content of said recordingapparatus or of said reproduction means in advance based on either saidpredetermined period of time or based on said predetermined period ofstandby time.
 93. A recording apparatus according to claim 76,characterized in that said recording means can measure time informationincluding said predetermined period of time.
 94. A recording apparatusaccording to claim 76, characterized in that said copy restrictedcontent includes time information including said predetermined period oftime.
 95. A recording apparatus according to claim 76, characterized inthat the time information including said predetermined period of thetime is gained from the outside independently of said copy restrictedcontent.